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| <span class="mdl-layout-title toc">Table Of Contents</span> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/crash-course/1-ndarray.html">Manipulate data with <code class="docutils literal notranslate"><span class="pre">ndarray</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/crash-course/2-nn.html">Create a neural network</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/crash-course/3-autograd.html">Automatic differentiation with <code class="docutils literal notranslate"><span class="pre">autograd</span></code></a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/crash-course/6-use_gpus.html">Use GPUs</a></li> |
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| <li class="toctree-l3"><a class="reference internal" href="../../../tutorials/getting-started/to-mxnet/index.html">Moving to MXNet from Other Frameworks</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/to-mxnet/pytorch.html">PyTorch vs Apache MXNet</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/custom_layer_beginners.html">How to write a custom layer in Apache MxNet Gluon API</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/data.html">Data</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/image-augmentation.html">Image Augmentation</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/init.html">Initialization</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/init.html#Conclusion">Conclusion</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/init.html#Recommended-Next-Steps">Recommended Next Steps</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/parameters.html">Parameter Management</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/trainer.html">Trainer</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/naming.html">Naming of Gluon Parameter and Blocks</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/custom-layer.html">Custom Layers</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/customop.html">Creating custom operators with numpy</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/hybridize.html">Hybridize</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/image/index.html">Image Tutorials</a><ul> |
| <li class="toctree-l5"><a class="reference internal" href="../../../tutorials/packages/gluon/image/mnist.html">Handwritten Digit Recognition</a></li> |
| <li class="toctree-l5"><a class="reference internal" href="../../../tutorials/packages/gluon/image/pretrained_models.html">Using pre-trained models in MXNet</a></li> |
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| <li class="toctree-l3"><a class="reference internal" href="../../../tutorials/packages/ndarray/index.html">NDArray</a><ul class="simple"> |
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| <li class="toctree-l3"><a class="reference internal" href="../../../tutorials/extend/custom_layer.html">How to write a custom layer in Apache MxNet Gluon API</a></li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../tutorials/extend/customop.html">Creating custom operators with numpy</a></li> |
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| </li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../api/gluon/rnn.html">rnn and contrib.rnn</a><ul> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.GRUCell.html">mxnet.gluon.rnn.GRUCell</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv2DRNNCell.html">mxnet.gluon.contrib.rnn.Conv2DRNNCell</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv2DLSTMCell.html">mxnet.gluon.contrib.rnn.Conv2DLSTMCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv3DLSTMCell.html">mxnet.gluon.contrib.rnn.Conv3DLSTMCell</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv3DGRUCell.html">mxnet.gluon.contrib.rnn.Conv3DGRUCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.VariationalDropoutCell.html">mxnet.gluon.contrib.rnn.VariationalDropoutCell</a></li> |
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| </li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../api/gluon/mxnet.gluon.loss.html"><code class="docutils literal notranslate"><span class="pre">loss</span></code></a><ul> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.SoftmaxCrossEntropyLoss.html">mxnet.gluon.loss.SoftmaxCrossEntropyLoss</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.HingeLoss.html">mxnet.gluon.loss.HingeLoss</a></li> |
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| </li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../api/gluon/mxnet.gluon.parameter.html">Parameter</a><ul> |
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| <li class="toctree-l3"><a class="reference internal" href="../../../api/gluon/mxnet.gluon.utils.html">utils</a><ul> |
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| <li class="toctree-l2"><a class="reference internal" href="../../../api/gluon-related/index.html">Gluon related modules</a><ul> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.one_hot.html">mxnet.symbol.Symbol.one_hot</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.pick.html">mxnet.symbol.Symbol.pick</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.__getitem__.html">mxnet.symbol.Symbol.__getitem__</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.infer_type.html">mxnet.symbol.Symbol.infer_type</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.infer_shape.html">mxnet.symbol.Symbol.infer_shape</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.infer_shape_partial.html">mxnet.symbol.Symbol.infer_shape_partial</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.bind.html">mxnet.symbol.Symbol.bind</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.simple_bind.html">mxnet.symbol.Symbol.simple_bind</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.save.html">mxnet.symbol.Symbol.save</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.tojson.html">mxnet.symbol.Symbol.tojson</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.debug_str.html">mxnet.symbol.Symbol.debug_str</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.Symbol.clip.html">mxnet.symbol.Symbol.clip</a></li> |
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| <li class="toctree-l3"><a class="reference internal" href="../../../api/symbol/mxnet.symbol.linalg.html">mxnet.linalg</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.linalg.gemm.html">mxnet.symbol.linalg.gemm</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol/_autogen/mxnet.symbol.linalg.potri.html">mxnet.symbol.linalg.potri</a></li> |
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| <li class="toctree-l2"><a class="reference internal" href="../../../api/symbol-related/index.html">Symbol related modules</a><ul> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol-related/_autogen/mxnet.callback.module_checkpoint.html">mxnet.callback.module_checkpoint</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol-related/_autogen/mxnet.callback.LogValidationMetricsCallback.html">mxnet.callback.LogValidationMetricsCallback</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol-related/_autogen/mxnet.callback.ProgressBar.html">mxnet.callback.ProgressBar</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol-related/_autogen/mxnet.module.BaseModule.html">mxnet.module.BaseModule</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol-related/_autogen/mxnet.module.BucketingModule.html">mxnet.module.BucketingModule</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol-related/_autogen/mxnet.module.Module.html">mxnet.module.Module</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol-related/_autogen/mxnet.module.PythonLossModule.html">mxnet.module.PythonLossModule</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/symbol-related/_autogen/mxnet.module.SequentialModule.html">mxnet.module.SequentialModule</a></li> |
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| <li class="toctree-l2"><a class="reference internal" href="../../../api/advanced/index.html">Advanced modules</a><ul> |
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| <li class="toctree-l3"><a class="reference internal" href="../../../api/advanced/mxnet.executor_manager.html">mxnet.executor_manager</a><ul> |
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| </ul> |
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| <li class="toctree-l3"><a class="reference internal" href="../../../api/advanced/mxnet.rtc.html">mxnet.rtc</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/advanced/_autogen/mxnet.rtc.CudaKernel.html">mxnet.rtc.CudaKernel</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/advanced/_autogen/mxnet.rtc.CudaModule.html">mxnet.rtc.CudaModule</a></li> |
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| </li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../api/advanced/mxnet.test_utils.html">mxnet.test_utils</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/advanced/_autogen/mxnet.test_utils.almost_equal.html">mxnet.test_utils.almost_equal</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/advanced/_autogen/mxnet.test_utils.almost_equal_ignore_nan.html">mxnet.test_utils.almost_equal_ignore_nan</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/advanced/_autogen/mxnet.test_utils.assert_almost_equal.html">mxnet.test_utils.assert_almost_equal</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/advanced/_autogen/mxnet.test_utils.assert_almost_equal_ignore_nan.html">mxnet.test_utils.assert_almost_equal_ignore_nan</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/advanced/_autogen/mxnet.test_utils.assert_exception.html">mxnet.test_utils.assert_exception</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/advanced/_autogen/mxnet.test_utils.discard_stderr.html">mxnet.test_utils.discard_stderr</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/advanced/_autogen/mxnet.test_utils.random_arrays.html">mxnet.test_utils.random_arrays</a></li> |
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| <span class="mdl-layout-title toc">Table Of Contents</span> |
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| <ul> |
| <li class="toctree-l1"><a class="reference internal" href="../../../tutorials/index.html">Python Tutorials</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../../tutorials/getting-started/index.html">Getting Started</a><ul> |
| <li class="toctree-l3"><a class="reference internal" href="../../../tutorials/getting-started/crash-course/index.html">Crash Course</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/crash-course/1-ndarray.html">Manipulate data with <code class="docutils literal notranslate"><span class="pre">ndarray</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/crash-course/2-nn.html">Create a neural network</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/crash-course/3-autograd.html">Automatic differentiation with <code class="docutils literal notranslate"><span class="pre">autograd</span></code></a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/crash-course/4-train.html">Train the neural network</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/crash-course/5-predict.html">Predict with a pre-trained model</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/crash-course/6-use_gpus.html">Use GPUs</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../tutorials/getting-started/to-mxnet/index.html">Moving to MXNet from Other Frameworks</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/getting-started/to-mxnet/pytorch.html">PyTorch vs Apache MXNet</a></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../tutorials/packages/index.html">Packages</a><ul> |
| <li class="toctree-l3"><a class="reference internal" href="../../../tutorials/packages/gluon/index.html">Gluon</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../tutorials/packages/gluon/custom_layer_beginners.html">How to write a custom layer in Apache MxNet Gluon API</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/ndarray/_autogen/mxnet.ndarray.NDArray.log.html">mxnet.ndarray.NDArray.log</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/ndarray/_autogen/mxnet.ndarray.exp.html">mxnet.ndarray.exp</a></li> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/ndarray/_autogen/mxnet.ndarray.sparse.sgd_mom_update.html">mxnet.ndarray.sparse.sgd_mom_update</a></li> |
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| </li> |
| </ul> |
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| <li class="toctree-l2"><a class="reference internal" href="../../../api/gluon/index.html">mxnet.gluon</a><ul> |
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| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Sequential.html">mxnet.gluon.nn.Sequential</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.HybridSequential.html">mxnet.gluon.nn.HybridSequential</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.nn.Concurrent.html">mxnet.gluon.contrib.nn.Concurrent</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.nn.HybridConcurrent.html">mxnet.gluon.contrib.nn.HybridConcurrent</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Dense.html">mxnet.gluon.nn.Dense</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Activation.html">mxnet.gluon.nn.Activation</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Dropout.html">mxnet.gluon.nn.Dropout</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Flatten.html">mxnet.gluon.nn.Flatten</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Lambda.html">mxnet.gluon.nn.Lambda</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.HybridLambda.html">mxnet.gluon.nn.HybridLambda</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Conv1D.html">mxnet.gluon.nn.Conv1D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Conv2D.html">mxnet.gluon.nn.Conv2D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Conv3D.html">mxnet.gluon.nn.Conv3D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Conv1DTranspose.html">mxnet.gluon.nn.Conv1DTranspose</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Conv2DTranspose.html">mxnet.gluon.nn.Conv2DTranspose</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Conv3DTranspose.html">mxnet.gluon.nn.Conv3DTranspose</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.MaxPool1D.html">mxnet.gluon.nn.MaxPool1D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.MaxPool2D.html">mxnet.gluon.nn.MaxPool2D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.MaxPool3D.html">mxnet.gluon.nn.MaxPool3D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.AvgPool1D.html">mxnet.gluon.nn.AvgPool1D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.AvgPool2D.html">mxnet.gluon.nn.AvgPool2D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.AvgPool3D.html">mxnet.gluon.nn.AvgPool3D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.GlobalMaxPool1D.html">mxnet.gluon.nn.GlobalMaxPool1D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.GlobalMaxPool2D.html">mxnet.gluon.nn.GlobalMaxPool2D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.GlobalMaxPool3D.html">mxnet.gluon.nn.GlobalMaxPool3D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.GlobalAvgPool1D.html">mxnet.gluon.nn.GlobalAvgPool1D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.GlobalAvgPool2D.html">mxnet.gluon.nn.GlobalAvgPool2D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.GlobalAvgPool3D.html">mxnet.gluon.nn.GlobalAvgPool3D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.ReflectionPad2D.html">mxnet.gluon.nn.ReflectionPad2D</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.BatchNorm.html">mxnet.gluon.nn.BatchNorm</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.InstanceNorm.html">mxnet.gluon.nn.InstanceNorm</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.LayerNorm.html">mxnet.gluon.nn.LayerNorm</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.nn.SyncBatchNorm.html">mxnet.gluon.contrib.nn.SyncBatchNorm</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Embedding.html">mxnet.gluon.nn.Embedding</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.nn.SparseEmbedding.html">mxnet.gluon.contrib.nn.SparseEmbedding</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.LeakyReLU.html">mxnet.gluon.nn.LeakyReLU</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.PReLU.html">mxnet.gluon.nn.PReLU</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.ELU.html">mxnet.gluon.nn.ELU</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.SELU.html">mxnet.gluon.nn.SELU</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.nn.Swish.html">mxnet.gluon.nn.Swish</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../api/gluon/rnn.html">rnn and contrib.rnn</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.LSTMCell.html">mxnet.gluon.rnn.LSTMCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.GRUCell.html">mxnet.gluon.rnn.GRUCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.RecurrentCell.html">mxnet.gluon.rnn.RecurrentCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.SequentialRNNCell.html">mxnet.gluon.rnn.SequentialRNNCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.BidirectionalCell.html">mxnet.gluon.rnn.BidirectionalCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.DropoutCell.html">mxnet.gluon.rnn.DropoutCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.ZoneoutCell.html">mxnet.gluon.rnn.ZoneoutCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.ResidualCell.html">mxnet.gluon.rnn.ResidualCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv1DRNNCell.html">mxnet.gluon.contrib.rnn.Conv1DRNNCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv2DRNNCell.html">mxnet.gluon.contrib.rnn.Conv2DRNNCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv3DRNNCell.html">mxnet.gluon.contrib.rnn.Conv3DRNNCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv1DLSTMCell.html">mxnet.gluon.contrib.rnn.Conv1DLSTMCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv2DLSTMCell.html">mxnet.gluon.contrib.rnn.Conv2DLSTMCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv3DLSTMCell.html">mxnet.gluon.contrib.rnn.Conv3DLSTMCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv1DGRUCell.html">mxnet.gluon.contrib.rnn.Conv1DGRUCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv2DGRUCell.html">mxnet.gluon.contrib.rnn.Conv2DGRUCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.Conv3DGRUCell.html">mxnet.gluon.contrib.rnn.Conv3DGRUCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.VariationalDropoutCell.html">mxnet.gluon.contrib.rnn.VariationalDropoutCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.contrib.rnn.LSTMPCell.html">mxnet.gluon.contrib.rnn.LSTMPCell</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.RNN.html">mxnet.gluon.rnn.RNN</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.LSTM.html">mxnet.gluon.rnn.LSTM</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.rnn.GRU.html">mxnet.gluon.rnn.GRU</a></li> |
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| </li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../api/gluon/mxnet.gluon.loss.html"><code class="docutils literal notranslate"><span class="pre">loss</span></code></a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.Loss.html">mxnet.gluon.loss.Loss</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.L2Loss.html">mxnet.gluon.loss.L2Loss</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.L1Loss.html">mxnet.gluon.loss.L1Loss</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.SigmoidBinaryCrossEntropyLoss.html">mxnet.gluon.loss.SigmoidBinaryCrossEntropyLoss</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.SoftmaxCrossEntropyLoss.html">mxnet.gluon.loss.SoftmaxCrossEntropyLoss</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.KLDivLoss.html">mxnet.gluon.loss.KLDivLoss</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.HuberLoss.html">mxnet.gluon.loss.HuberLoss</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.HingeLoss.html">mxnet.gluon.loss.HingeLoss</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.SquaredHingeLoss.html">mxnet.gluon.loss.SquaredHingeLoss</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.LogisticLoss.html">mxnet.gluon.loss.LogisticLoss</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.TripletLoss.html">mxnet.gluon.loss.TripletLoss</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.loss.CTCLoss.html">mxnet.gluon.loss.CTCLoss</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../api/gluon/mxnet.gluon.parameter.html">Parameter</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.initialize.html">mxnet.gluon.Parameter.initialize</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.data.html">mxnet.gluon.Parameter.data</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.list_data.html">mxnet.gluon.Parameter.list_data</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.list_row_sparse_data.html">mxnet.gluon.Parameter.list_row_sparse_data</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.row_sparse_data.html">mxnet.gluon.Parameter.row_sparse_data</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.set_data.html">mxnet.gluon.Parameter.set_data</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.shape.html">mxnet.gluon.Parameter.shape</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.grad.html">mxnet.gluon.Parameter.grad</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.list_grad.html">mxnet.gluon.Parameter.list_grad</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.zero_grad.html">mxnet.gluon.Parameter.zero_grad</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.grad_req.html">mxnet.gluon.Parameter.grad_req</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.cast.html">mxnet.gluon.Parameter.cast</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.list_ctx.html">mxnet.gluon.Parameter.list_ctx</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.reset_ctx.html">mxnet.gluon.Parameter.reset_ctx</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Parameter.var.html">mxnet.gluon.Parameter.var</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../api/gluon/mxnet.gluon.Trainer.html">Trainer</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Trainer.step.html">mxnet.gluon.Trainer.step</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Trainer.allreduce_grads.html">mxnet.gluon.Trainer.allreduce_grads</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Trainer.update.html">mxnet.gluon.Trainer.update</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Trainer.load_states.html">mxnet.gluon.Trainer.load_states</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Trainer.save_states.html">mxnet.gluon.Trainer.save_states</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Trainer.learning_rate.html">mxnet.gluon.Trainer.learning_rate</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.Trainer.set_learning_rate.html">mxnet.gluon.Trainer.set_learning_rate</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../api/gluon/mxnet.gluon.data.html">data</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.Dataset.html">mxnet.gluon.data.Dataset</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.ArrayDataset.html">mxnet.gluon.data.ArrayDataset</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.RecordFileDataset.html">mxnet.gluon.data.RecordFileDataset</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.Sampler.html">mxnet.gluon.data.Sampler</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.SequentialSampler.html">mxnet.gluon.data.SequentialSampler</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.RandomSampler.html">mxnet.gluon.data.RandomSampler</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.BatchSampler.html">mxnet.gluon.data.BatchSampler</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.DataLoader.html">mxnet.gluon.data.DataLoader</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l3"><a class="reference internal" href="../../../api/gluon/mxnet.gluon.data.vision.html">data.vision</a><ul> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.datasets.MNIST.html">mxnet.gluon.data.vision.datasets.MNIST</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.datasets.FashionMNIST.html">mxnet.gluon.data.vision.datasets.FashionMNIST</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.datasets.CIFAR10.html">mxnet.gluon.data.vision.datasets.CIFAR10</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.datasets.CIFAR100.html">mxnet.gluon.data.vision.datasets.CIFAR100</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.datasets.ImageRecordDataset.html">mxnet.gluon.data.vision.datasets.ImageRecordDataset</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.datasets.ImageFolderDataset.html">mxnet.gluon.data.vision.datasets.ImageFolderDataset</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.transforms.Compose.html">mxnet.gluon.data.vision.transforms.Compose</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.transforms.Cast.html">mxnet.gluon.data.vision.transforms.Cast</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.transforms.ToTensor.html">mxnet.gluon.data.vision.transforms.ToTensor</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.transforms.Normalize.html">mxnet.gluon.data.vision.transforms.Normalize</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.transforms.RandomResizedCrop.html">mxnet.gluon.data.vision.transforms.RandomResizedCrop</a></li> |
| <li class="toctree-l4"><a class="reference internal" href="../../../api/gluon/_autogen/mxnet.gluon.data.vision.transforms.CenterCrop.html">mxnet.gluon.data.vision.transforms.CenterCrop</a></li> |
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| </li> |
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| <li class="toctree-l3"><a class="reference internal" href="../../../api/gluon/mxnet.gluon.utils.html">utils</a><ul> |
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| |
| <h1>Source code for mxnet.ndarray.sparse</h1><div class="highlight"><pre> |
| <span></span><span class="c1"># Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="c1"># or more contributor license agreements. See the NOTICE file</span> |
| <span class="c1"># distributed with this work for additional information</span> |
| <span class="c1"># regarding copyright ownership. The ASF licenses this file</span> |
| <span class="c1"># to you under the Apache License, Version 2.0 (the</span> |
| <span class="c1"># "License"); you may not use this file except in compliance</span> |
| <span class="c1"># with the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing,</span> |
| <span class="c1"># software distributed under the License is distributed on an</span> |
| <span class="c1"># "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span> |
| <span class="c1"># KIND, either express or implied. See the License for the</span> |
| <span class="c1"># specific language governing permissions and limitations</span> |
| <span class="c1"># under the License.</span> |
| |
| <span class="c1"># coding: utf-8</span> |
| <span class="c1"># pylint: disable=wildcard-import, unused-wildcard-import, too-many-lines</span> |
| <span class="sd">"""Sparse NDArray API of MXNet."""</span> |
| |
| <span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">absolute_import</span> |
| <span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">division</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="kn">from</span> <span class="nn">__builtin__</span> <span class="k">import</span> <span class="nb">slice</span> <span class="k">as</span> <span class="n">py_slice</span> |
| <span class="kn">from</span> <span class="nn">__builtin__</span> <span class="k">import</span> <span class="nb">sum</span> <span class="k">as</span> <span class="n">py_sum</span> |
| <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span> |
| <span class="kn">from</span> <span class="nn">builtins</span> <span class="k">import</span> <span class="nb">slice</span> <span class="k">as</span> <span class="n">py_slice</span> |
| <span class="kn">from</span> <span class="nn">builtins</span> <span class="k">import</span> <span class="nb">sum</span> <span class="k">as</span> <span class="n">py_sum</span> |
| |
| <span class="kn">import</span> <span class="nn">ctypes</span> |
| <span class="kn">import</span> <span class="nn">warnings</span> |
| <span class="kn">import</span> <span class="nn">operator</span> |
| <span class="kn">from</span> <span class="nn">array</span> <span class="k">import</span> <span class="n">array</span> <span class="k">as</span> <span class="n">native_array</span> |
| |
| <span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"_ndarray_cls"</span><span class="p">,</span> <span class="s2">"csr_matrix"</span><span class="p">,</span> <span class="s2">"row_sparse_array"</span><span class="p">,</span> |
| <span class="s2">"BaseSparseNDArray"</span><span class="p">,</span> <span class="s2">"CSRNDArray"</span><span class="p">,</span> <span class="s2">"RowSparseNDArray"</span><span class="p">,</span> |
| <span class="s2">"add"</span><span class="p">,</span> <span class="s2">"subtract"</span><span class="p">,</span> <span class="s2">"multiply"</span><span class="p">,</span> <span class="s2">"divide"</span><span class="p">]</span> |
| |
| <span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span> |
| <span class="kn">from</span> <span class="nn">..base</span> <span class="k">import</span> <span class="n">NotSupportedForSparseNDArray</span> |
| <span class="kn">from</span> <span class="nn">..base</span> <span class="k">import</span> <span class="n">_LIB</span><span class="p">,</span> <span class="n">numeric_types</span> |
| <span class="kn">from</span> <span class="nn">..base</span> <span class="k">import</span> <span class="n">c_array_buf</span><span class="p">,</span> <span class="n">mx_real_t</span><span class="p">,</span> <span class="n">integer_types</span> |
| <span class="kn">from</span> <span class="nn">..base</span> <span class="k">import</span> <span class="n">mx_uint</span><span class="p">,</span> <span class="n">NDArrayHandle</span><span class="p">,</span> <span class="n">check_call</span> |
| <span class="kn">from</span> <span class="nn">..context</span> <span class="k">import</span> <span class="n">Context</span><span class="p">,</span> <span class="n">current_context</span> |
| <span class="kn">from</span> <span class="nn">.</span> <span class="k">import</span> <span class="n">_internal</span> |
| <span class="kn">from</span> <span class="nn">.</span> <span class="k">import</span> <span class="n">op</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="kn">from</span> <span class="nn">.gen_sparse</span> <span class="k">import</span> <span class="n">retain</span> <span class="k">as</span> <span class="n">gs_retain</span> <span class="c1"># pylint: disable=redefined-builtin</span> |
| <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span> |
| <span class="n">gs_retain</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="kn">from</span> <span class="nn">._internal</span> <span class="k">import</span> <span class="n">_set_ndarray_class</span> |
| <span class="kn">from</span> <span class="nn">.ndarray</span> <span class="k">import</span> <span class="n">NDArray</span><span class="p">,</span> <span class="n">_storage_type</span><span class="p">,</span> <span class="n">_DTYPE_NP_TO_MX</span><span class="p">,</span> <span class="n">_DTYPE_MX_TO_NP</span> |
| <span class="kn">from</span> <span class="nn">.ndarray</span> <span class="k">import</span> <span class="n">_STORAGE_TYPE_STR_TO_ID</span><span class="p">,</span> <span class="n">_STORAGE_TYPE_ROW_SPARSE</span><span class="p">,</span> <span class="n">_STORAGE_TYPE_CSR</span> |
| <span class="kn">from</span> <span class="nn">.ndarray</span> <span class="k">import</span> <span class="n">_STORAGE_TYPE_UNDEFINED</span><span class="p">,</span> <span class="n">_STORAGE_TYPE_DEFAULT</span> |
| <span class="kn">from</span> <span class="nn">.ndarray</span> <span class="k">import</span> <span class="n">zeros</span> <span class="k">as</span> <span class="n">_zeros_ndarray</span> |
| <span class="kn">from</span> <span class="nn">.ndarray</span> <span class="k">import</span> <span class="n">array</span> <span class="k">as</span> <span class="n">_array</span> |
| <span class="kn">from</span> <span class="nn">.ndarray</span> <span class="k">import</span> <span class="n">_ufunc_helper</span> |
| |
| |
| <span class="k">try</span><span class="p">:</span> |
| <span class="kn">import</span> <span class="nn">scipy.sparse</span> <span class="k">as</span> <span class="nn">spsp</span> |
| <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span> |
| <span class="n">spsp</span> <span class="o">=</span> <span class="kc">None</span> |
| |
| <span class="n">_STORAGE_AUX_TYPES</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="s1">'row_sparse'</span><span class="p">:</span> <span class="p">[</span><span class="n">np</span><span class="o">.</span><span class="n">int64</span><span class="p">],</span> |
| <span class="s1">'csr'</span><span class="p">:</span> <span class="p">[</span><span class="n">np</span><span class="o">.</span><span class="n">int64</span><span class="p">,</span> <span class="n">np</span><span class="o">.</span><span class="n">int64</span><span class="p">]</span> |
| <span class="p">}</span> |
| |
| |
| <span class="k">def</span> <span class="nf">_new_alloc_handle</span><span class="p">(</span><span class="n">stype</span><span class="p">,</span> <span class="n">shape</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="n">delay_alloc</span><span class="p">,</span> <span class="n">dtype</span><span class="p">,</span> <span class="n">aux_types</span><span class="p">,</span> <span class="n">aux_shapes</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""Return a new handle with specified storage type, shape, dtype and context.</span> |
| |
| <span class="sd"> Empty handle is only used to hold results</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> handle</span> |
| <span class="sd"> A new empty ndarray handle</span> |
| <span class="sd"> """</span> |
| <span class="n">hdl</span> <span class="o">=</span> <span class="n">NDArrayHandle</span><span class="p">()</span> |
| <span class="k">for</span> <span class="n">aux_t</span> <span class="ow">in</span> <span class="n">aux_types</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">np</span><span class="o">.</span><span class="n">dtype</span><span class="p">(</span><span class="n">aux_t</span><span class="p">)</span> <span class="o">!=</span> <span class="n">np</span><span class="o">.</span><span class="n">dtype</span><span class="p">(</span><span class="s2">"int64"</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">(</span><span class="s2">"only int64 is supported for aux types"</span><span class="p">)</span> |
| <span class="n">aux_type_ids</span> <span class="o">=</span> <span class="p">[</span><span class="nb">int</span><span class="p">(</span><span class="n">_DTYPE_NP_TO_MX</span><span class="p">[</span><span class="n">np</span><span class="o">.</span><span class="n">dtype</span><span class="p">(</span><span class="n">aux_t</span><span class="p">)</span><span class="o">.</span><span class="n">type</span><span class="p">])</span> <span class="k">for</span> <span class="n">aux_t</span> <span class="ow">in</span> <span class="n">aux_types</span><span class="p">]</span> |
| <span class="n">aux_shapes</span> <span class="o">=</span> <span class="p">[(</span><span class="mi">0</span><span class="p">,)</span> <span class="k">for</span> <span class="n">aux_t</span> <span class="ow">in</span> <span class="n">aux_types</span><span class="p">]</span> <span class="k">if</span> <span class="n">aux_shapes</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">aux_shapes</span> |
| <span class="n">aux_shape_lens</span> <span class="o">=</span> <span class="p">[</span><span class="nb">len</span><span class="p">(</span><span class="n">aux_shape</span><span class="p">)</span> <span class="k">for</span> <span class="n">aux_shape</span> <span class="ow">in</span> <span class="n">aux_shapes</span><span class="p">]</span> |
| <span class="n">aux_shapes</span> <span class="o">=</span> <span class="n">py_sum</span><span class="p">(</span><span class="n">aux_shapes</span><span class="p">,</span> <span class="p">())</span> |
| <span class="n">num_aux</span> <span class="o">=</span> <span class="n">mx_uint</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">aux_types</span><span class="p">))</span> |
| <span class="n">check_call</span><span class="p">(</span><span class="n">_LIB</span><span class="o">.</span><span class="n">MXNDArrayCreateSparseEx</span><span class="p">(</span> |
| <span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">_STORAGE_TYPE_STR_TO_ID</span><span class="p">[</span><span class="n">stype</span><span class="p">])),</span> |
| <span class="n">c_array_buf</span><span class="p">(</span><span class="n">mx_uint</span><span class="p">,</span> <span class="n">native_array</span><span class="p">(</span><span class="s1">'I'</span><span class="p">,</span> <span class="n">shape</span><span class="p">)),</span> |
| <span class="n">mx_uint</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">shape</span><span class="p">)),</span> |
| <span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">(</span><span class="n">ctx</span><span class="o">.</span><span class="n">device_typeid</span><span class="p">),</span> |
| <span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">(</span><span class="n">ctx</span><span class="o">.</span><span class="n">device_id</span><span class="p">),</span> |
| <span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">delay_alloc</span><span class="p">)),</span> |
| <span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">_DTYPE_NP_TO_MX</span><span class="p">[</span><span class="n">np</span><span class="o">.</span><span class="n">dtype</span><span class="p">(</span><span class="n">dtype</span><span class="p">)</span><span class="o">.</span><span class="n">type</span><span class="p">])),</span> |
| <span class="n">num_aux</span><span class="p">,</span> |
| <span class="n">c_array_buf</span><span class="p">(</span><span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">,</span> <span class="n">native_array</span><span class="p">(</span><span class="s1">'i'</span><span class="p">,</span> <span class="n">aux_type_ids</span><span class="p">)),</span> |
| <span class="n">c_array_buf</span><span class="p">(</span><span class="n">mx_uint</span><span class="p">,</span> <span class="n">native_array</span><span class="p">(</span><span class="s1">'I'</span><span class="p">,</span> <span class="n">aux_shape_lens</span><span class="p">)),</span> |
| <span class="n">c_array_buf</span><span class="p">(</span><span class="n">mx_uint</span><span class="p">,</span> <span class="n">native_array</span><span class="p">(</span><span class="s1">'I'</span><span class="p">,</span> <span class="n">aux_shapes</span><span class="p">)),</span> |
| <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">hdl</span><span class="p">)))</span> |
| <span class="k">return</span> <span class="n">hdl</span> |
| |
| |
| <span class="k">class</span> <span class="nc">BaseSparseNDArray</span><span class="p">(</span><span class="n">NDArray</span><span class="p">):</span> |
| <span class="sd">"""The base class of an NDArray stored in a sparse storage format.</span> |
| |
| <span class="sd"> See CSRNDArray and RowSparseNDArray for more details.</span> |
| <span class="sd"> """</span> |
| |
| <span class="k">def</span> <span class="nf">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Returns a string representation of the sparse array."""</span> |
| <span class="n">shape_info</span> <span class="o">=</span> <span class="s1">'x'</span><span class="o">.</span><span class="n">join</span><span class="p">([</span><span class="s1">'</span><span class="si">%d</span><span class="s1">'</span> <span class="o">%</span> <span class="n">x</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">])</span> |
| <span class="c1"># The data content is not displayed since the array usually has big shape</span> |
| <span class="k">return</span> <span class="s1">'</span><span class="se">\n</span><span class="s1"><</span><span class="si">%s</span><span class="s1"> </span><span class="si">%s</span><span class="s1"> @</span><span class="si">%s</span><span class="s1">>'</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">,</span> |
| <span class="n">shape_info</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">context</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">__add__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">add</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">__sub__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">subtract</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">__mul__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">multiply</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">__div__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">divide</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">__iadd__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">__isub__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">__imul__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">__idiv__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">__itruediv__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">_sync_copyfrom</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_array</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">_at</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">idx</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">NotSupportedForSparseNDArray</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_at</span><span class="p">,</span> <span class="s1">'[idx]'</span><span class="p">,</span> <span class="n">idx</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">_slice</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">start</span><span class="p">,</span> <span class="n">stop</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">NotSupportedForSparseNDArray</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_slice</span><span class="p">,</span> <span class="kc">None</span><span class="p">,</span> <span class="n">start</span><span class="p">,</span> <span class="n">stop</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">reshape</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">shape</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">NotSupportedForSparseNDArray</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">reshape</span><span class="p">,</span> <span class="kc">None</span><span class="p">,</span> <span class="n">shape</span><span class="p">)</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">size</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="c1"># the `size` for a sparse ndarray is ambiguous, hence disabled.</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">_aux_type</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">i</span><span class="p">):</span> |
| <span class="sd">"""Data-type of the array's ith aux data.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> numpy.dtype</span> |
| <span class="sd"> This BaseSparseNDArray's aux data type.</span> |
| <span class="sd"> """</span> |
| <span class="n">aux_type</span> <span class="o">=</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">()</span> |
| <span class="n">check_call</span><span class="p">(</span><span class="n">_LIB</span><span class="o">.</span><span class="n">MXNDArrayGetAuxType</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">i</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">aux_type</span><span class="p">)))</span> |
| <span class="k">return</span> <span class="n">_DTYPE_MX_TO_NP</span><span class="p">[</span><span class="n">aux_type</span><span class="o">.</span><span class="n">value</span><span class="p">]</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">_num_aux</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""The number of aux data used to help store the sparse ndarray.</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="n">_STORAGE_AUX_TYPES</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">stype</span><span class="p">])</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">_aux_types</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""The data types of the aux data for the BaseSparseNDArray.</span> |
| <span class="sd"> """</span> |
| <span class="n">aux_types</span> <span class="o">=</span> <span class="p">[]</span> |
| <span class="n">num_aux</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_num_aux</span> |
| <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">num_aux</span><span class="p">):</span> |
| <span class="n">aux_types</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_aux_type</span><span class="p">(</span><span class="n">i</span><span class="p">))</span> |
| <span class="k">return</span> <span class="n">aux_types</span> |
| |
| <span class="k">def</span> <span class="nf">asnumpy</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Return a dense ``numpy.ndarray`` object with value copied from this array</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">tostype</span><span class="p">(</span><span class="s1">'default'</span><span class="p">)</span><span class="o">.</span><span class="n">asnumpy</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">astype</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dtype</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> |
| <span class="sd">"""Return a copy of the array after casting to a specified type.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> dtype : numpy.dtype or str</span> |
| <span class="sd"> The type of the returned array.</span> |
| <span class="sd"> copy : bool</span> |
| <span class="sd"> Default `True`. By default, astype always returns a newly</span> |
| <span class="sd"> allocated ndarray on the same context. If this is set to</span> |
| <span class="sd"> `False`, and the dtype requested is the same as the ndarray's</span> |
| <span class="sd"> dtype, the ndarray is returned instead of a copy.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> x = mx.nd.sparse.zeros('row_sparse', (2,3), dtype='float32')</span> |
| <span class="sd"> >>> y = x.astype('int32')</span> |
| <span class="sd"> >>> y.dtype</span> |
| <span class="sd"> <type 'numpy.int32'></span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">copy</span> <span class="ow">and</span> <span class="n">np</span><span class="o">.</span><span class="n">dtype</span><span class="p">(</span><span class="n">dtype</span><span class="p">)</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">dtype</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| |
| <span class="n">res</span> <span class="o">=</span> <span class="n">zeros</span><span class="p">(</span><span class="n">shape</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">context</span><span class="p">,</span> |
| <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">,</span> <span class="n">stype</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">stype</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="n">res</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">res</span> |
| |
| <span class="k">def</span> <span class="nf">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="sd">"""Copies the value of this array to another array.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> other : NDArray or CSRNDArray or RowSparseNDArray or Context</span> |
| <span class="sd"> The destination array or context.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray or CSRNDArray or RowSparseNDArray</span> |
| <span class="sd"> The copied array.</span> |
| <span class="sd"> """</span> |
| <span class="c1"># pylint: disable= no-member, protected-access</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">other</span><span class="o">.</span><span class="n">handle</span> <span class="ow">is</span> <span class="bp">self</span><span class="o">.</span><span class="n">handle</span><span class="p">:</span> |
| <span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span><span class="s1">'You are attempting to copy an array to itself'</span><span class="p">,</span> <span class="ne">RuntimeWarning</span><span class="p">)</span> |
| <span class="k">return</span> <span class="kc">False</span> |
| <span class="k">return</span> <span class="n">_internal</span><span class="o">.</span><span class="n">_copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">out</span><span class="o">=</span><span class="n">other</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">Context</span><span class="p">):</span> |
| <span class="n">hret</span> <span class="o">=</span> <span class="n">_ndarray_cls</span><span class="p">(</span><span class="n">_new_alloc_handle</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">stype</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">other</span><span class="p">,</span> |
| <span class="kc">True</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dtype</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_aux_types</span><span class="p">))</span> |
| <span class="k">return</span> <span class="n">_internal</span><span class="o">.</span><span class="n">_copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">out</span><span class="o">=</span><span class="n">hret</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'copyto does not support type '</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">other</span><span class="p">)))</span> |
| <span class="c1"># pylint: enable= no-member, protected-access</span> |
| |
| <span class="k">def</span> <span class="nf">check_format</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">full_check</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> |
| <span class="sd">"""Check whether the NDArray format is valid.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> full_check : bool, optional</span> |
| <span class="sd"> If `True`, rigorous check, O(N) operations. Otherwise</span> |
| <span class="sd"> basic check, O(1) operations (default True).</span> |
| <span class="sd"> """</span> |
| <span class="n">check_call</span><span class="p">(</span><span class="n">_LIB</span><span class="o">.</span><span class="n">MXNDArraySyncCheckFormat</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">c_bool</span><span class="p">(</span><span class="n">full_check</span><span class="p">)))</span> |
| |
| <span class="k">def</span> <span class="nf">_data</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""A deep copy NDArray of the data array associated with the BaseSparseNDArray.</span> |
| |
| <span class="sd"> This function blocks. Do not use it in performance critical code.</span> |
| <span class="sd"> """</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">wait_to_read</span><span class="p">()</span> |
| <span class="n">hdl</span> <span class="o">=</span> <span class="n">NDArrayHandle</span><span class="p">()</span> |
| <span class="n">check_call</span><span class="p">(</span><span class="n">_LIB</span><span class="o">.</span><span class="n">MXNDArrayGetDataNDArray</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">hdl</span><span class="p">)))</span> |
| <span class="k">return</span> <span class="n">NDArray</span><span class="p">(</span><span class="n">hdl</span><span class="p">)</span> |
| |
| |
| <span class="k">def</span> <span class="nf">_aux_data</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">i</span><span class="p">):</span> |
| <span class="sd">""" Get a deep copy NDArray of the i-th aux data array associated with the</span> |
| <span class="sd"> BaseSparseNDArray.</span> |
| |
| <span class="sd"> This function blocks. Do not use it in performance critical code.</span> |
| <span class="sd"> """</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">wait_to_read</span><span class="p">()</span> |
| <span class="n">hdl</span> <span class="o">=</span> <span class="n">NDArrayHandle</span><span class="p">()</span> |
| <span class="n">check_call</span><span class="p">(</span><span class="n">_LIB</span><span class="o">.</span><span class="n">MXNDArrayGetAuxNDArray</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">i</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">hdl</span><span class="p">)))</span> |
| <span class="k">return</span> <span class="n">NDArray</span><span class="p">(</span><span class="n">hdl</span><span class="p">)</span> |
| |
| |
| <span class="c1"># pylint: disable=abstract-method</span> |
| <span class="k">class</span> <span class="nc">CSRNDArray</span><span class="p">(</span><span class="n">BaseSparseNDArray</span><span class="p">):</span> |
| <span class="sd">"""A sparse representation of 2D NDArray in the Compressed Sparse Row format.</span> |
| |
| <span class="sd"> A CSRNDArray represents an NDArray as three separate arrays: `data`,</span> |
| <span class="sd"> `indptr` and `indices`. It uses the CSR representation where the column indices for</span> |
| <span class="sd"> row i are stored in ``indices[indptr[i]:indptr[i+1]]`` and their corresponding values are stored</span> |
| <span class="sd"> in ``data[indptr[i]:indptr[i+1]]``.</span> |
| |
| <span class="sd"> The column indices for a given row are expected to be sorted in ascending order.</span> |
| <span class="sd"> Duplicate column entries for the same row are not allowed.</span> |
| |
| <span class="sd"> Example</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> >>> a = mx.nd.array([[0, 1, 0], [2, 0, 0], [0, 0, 0], [0, 0, 3]])</span> |
| <span class="sd"> >>> a = a.tostype('csr')</span> |
| <span class="sd"> >>> a.data.asnumpy()</span> |
| <span class="sd"> array([ 1., 2., 3.], dtype=float32)</span> |
| <span class="sd"> >>> a.indices.asnumpy()</span> |
| <span class="sd"> array([1, 0, 2])</span> |
| <span class="sd"> >>> a.indptr.asnumpy()</span> |
| <span class="sd"> array([0, 1, 2, 2, 3])</span> |
| |
| <span class="sd"> See Also</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> csr_matrix: Several ways to construct a CSRNDArray</span> |
| <span class="sd"> """</span> |
| |
| <span class="k">def</span> <span class="nf">__reduce__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">CSRNDArray</span><span class="p">,</span> <span class="p">(</span><span class="kc">None</span><span class="p">,),</span> <span class="nb">super</span><span class="p">(</span><span class="n">CSRNDArray</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__getstate__</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">__iadd__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="p">(</span><span class="bp">self</span> <span class="o">+</span> <span class="n">other</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| |
| <span class="k">def</span> <span class="nf">__isub__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="p">(</span><span class="bp">self</span> <span class="o">-</span> <span class="n">other</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| |
| <span class="k">def</span> <span class="nf">__imul__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="p">(</span><span class="bp">self</span> <span class="o">*</span> <span class="n">other</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| |
| <span class="k">def</span> <span class="nf">__idiv__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="p">(</span><span class="bp">self</span> <span class="o">/</span> <span class="n">other</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| |
| <span class="k">def</span> <span class="nf">__itruediv__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="p">(</span><span class="bp">self</span> <span class="o">/</span> <span class="n">other</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| |
| <span class="k">def</span> <span class="nf">__getitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span> |
| <span class="sd">"""x.__getitem__(i) <=> x[i]</span> |
| |
| <span class="sd"> Returns a newly created NDArray based on the indexing key.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> key : int or mxnet.ndarray.NDArray.slice</span> |
| <span class="sd"> Indexing key.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> indptr = np.array([0, 2, 3, 6])</span> |
| <span class="sd"> >>> indices = np.array([0, 2, 2, 0, 1, 2])</span> |
| <span class="sd"> >>> data = np.array([1, 2, 3, 4, 5, 6])</span> |
| <span class="sd"> >>> a = mx.nd.sparse.csr_matrix((data, indices, indptr), shape=(3, 3))</span> |
| <span class="sd"> >>> a.asnumpy()</span> |
| <span class="sd"> array([[ 1., 0., 2.],</span> |
| <span class="sd"> [ 0., 0., 3.],</span> |
| <span class="sd"> [ 4., 5., 6.]], dtype=float32)</span> |
| <span class="sd"> >>> a[1:2].asnumpy()</span> |
| <span class="sd"> array([[ 0., 0., 3.]], dtype=float32)</span> |
| <span class="sd"> >>> a[1].asnumpy()</span> |
| <span class="sd"> array([[ 0., 0., 3.]], dtype=float32)</span> |
| <span class="sd"> >>> a[-1].asnumpy()</span> |
| <span class="sd"> array([[ 4., 5., 6.]], dtype=float32)</span> |
| <span class="sd"> """</span> |
| <span class="c1"># pylint: disable= no-member, protected-access</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="nb">int</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">key</span> <span class="o">==</span> <span class="o">-</span><span class="mi">1</span><span class="p">:</span> |
| <span class="n">begin</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">-</span> <span class="mi">1</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">begin</span> <span class="o">=</span> <span class="n">key</span> |
| <span class="k">return</span> <span class="n">op</span><span class="o">.</span><span class="n">slice</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">begin</span><span class="o">=</span><span class="n">begin</span><span class="p">,</span> <span class="n">end</span><span class="o">=</span><span class="n">begin</span><span class="o">+</span><span class="mi">1</span><span class="p">)</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">py_slice</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">key</span><span class="o">.</span><span class="n">step</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'CSRNDArray only supports continuous slicing on axis 0'</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">key</span><span class="o">.</span><span class="n">start</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">or</span> <span class="n">key</span><span class="o">.</span><span class="n">stop</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">begin</span> <span class="o">=</span> <span class="n">key</span><span class="o">.</span><span class="n">start</span> <span class="k">if</span> <span class="n">key</span><span class="o">.</span><span class="n">start</span> <span class="k">else</span> <span class="mi">0</span> |
| <span class="n">end</span> <span class="o">=</span> <span class="n">key</span><span class="o">.</span><span class="n">stop</span> <span class="k">if</span> <span class="n">key</span><span class="o">.</span><span class="n">stop</span> <span class="k">else</span> <span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> |
| <span class="k">return</span> <span class="n">op</span><span class="o">.</span><span class="n">slice</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">begin</span><span class="o">=</span><span class="n">begin</span><span class="p">,</span> <span class="n">end</span><span class="o">=</span><span class="n">end</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Multi-dimension indexing is not supported'</span><span class="p">)</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Undefined behaviour for </span><span class="si">{}</span><span class="s1">'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">key</span><span class="p">))</span> |
| <span class="c1"># pylint: enable= no-member, protected-access</span> |
| |
| <span class="k">def</span> <span class="nf">__setitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span> |
| <span class="sd">"""x.__setitem__(i, y) <=> x[i]=y</span> |
| |
| <span class="sd"> Set self[key] to value. Only slice key [:] is supported.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> key : mxnet.ndarray.NDArray.slice</span> |
| <span class="sd"> The indexing key.</span> |
| <span class="sd"> value : NDArray or CSRNDArray or numpy.ndarray</span> |
| <span class="sd"> The value to set.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> src = mx.nd.sparse.zeros('csr', (3,3))</span> |
| <span class="sd"> >>> src.asnumpy()</span> |
| <span class="sd"> array([[ 0., 0., 0.],</span> |
| <span class="sd"> [ 0., 0., 0.],</span> |
| <span class="sd"> [ 0., 0., 0.]], dtype=float32)</span> |
| <span class="sd"> >>> # assign CSRNDArray with same storage type</span> |
| <span class="sd"> >>> x = mx.nd.ones((3,3)).tostype('csr')</span> |
| <span class="sd"> >>> x[:] = src</span> |
| <span class="sd"> >>> x.asnumpy()</span> |
| <span class="sd"> array([[ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> # assign NDArray to CSRNDArray</span> |
| <span class="sd"> >>> x[:] = mx.nd.ones((3,3)) * 2</span> |
| <span class="sd"> >>> x.asnumpy()</span> |
| <span class="sd"> array([[ 2., 2., 2.],</span> |
| <span class="sd"> [ 2., 2., 2.],</span> |
| <span class="sd"> [ 2., 2., 2.]], dtype=float32)</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">writable</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Failed to assign to a readonly CSRNDArray'</span><span class="p">)</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">py_slice</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">key</span><span class="o">.</span><span class="n">step</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">or</span> <span class="n">key</span><span class="o">.</span><span class="n">start</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">or</span> <span class="n">key</span><span class="o">.</span><span class="n">stop</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Assignment with slice for CSRNDArray is not '</span> \ |
| <span class="s1">'implemented yet.'</span><span class="p">)</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="c1"># avoid copying to itself</span> |
| <span class="k">if</span> <span class="n">value</span><span class="o">.</span><span class="n">handle</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">handle</span><span class="p">:</span> |
| <span class="n">value</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">numeric_types</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Assigning numeric types to CSRNDArray is "</span> \ |
| <span class="s2">"not implemented yet."</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">ndarray</span><span class="p">,</span> <span class="n">np</span><span class="o">.</span><span class="n">generic</span><span class="p">)):</span> |
| <span class="c1"># TODO(haibin/anisub) check scipy.sparse and use _sync_copy_from to</span> |
| <span class="c1"># avoid the temporary copy</span> |
| <span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span><span class="s1">'Assigning non-NDArray object to CSRNDArray is not efficient'</span><span class="p">,</span> |
| <span class="ne">RuntimeWarning</span><span class="p">)</span> |
| <span class="n">tmp</span> <span class="o">=</span> <span class="n">_array</span><span class="p">(</span><span class="n">value</span><span class="p">)</span> |
| <span class="n">tmp</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'type </span><span class="si">%s</span><span class="s1"> not supported'</span> <span class="o">%</span> <span class="nb">str</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">value</span><span class="p">)))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">assert</span><span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="p">(</span><span class="nb">int</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">)))</span> |
| <span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s1">'CSRNDArray only supports [:] for assignment'</span><span class="p">)</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">indices</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""A deep copy NDArray of the indices array of the CSRNDArray.</span> |
| <span class="sd"> This generates a deep copy of the column indices of the current `csr` matrix.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray</span> |
| <span class="sd"> This CSRNDArray's indices array.</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_aux_data</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">indptr</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""A deep copy NDArray of the indptr array of the CSRNDArray.</span> |
| <span class="sd"> This generates a deep copy of the `indptr` of the current `csr` matrix.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray</span> |
| <span class="sd"> This CSRNDArray's indptr array.</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_aux_data</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">data</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""A deep copy NDArray of the data array of the CSRNDArray.</span> |
| <span class="sd"> This generates a deep copy of the `data` of the current `csr` matrix.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray</span> |
| <span class="sd"> This CSRNDArray's data array.</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_data</span><span class="p">()</span> |
| |
| <span class="nd">@indices</span><span class="o">.</span><span class="n">setter</span> |
| <span class="k">def</span> <span class="nf">indices</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">indices</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| <span class="nd">@indptr</span><span class="o">.</span><span class="n">setter</span> |
| <span class="k">def</span> <span class="nf">indptr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">indptr</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| <span class="nd">@data</span><span class="o">.</span><span class="n">setter</span> |
| <span class="k">def</span> <span class="nf">data</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| |
| <span class="k">def</span> <span class="nf">tostype</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">stype</span><span class="p">):</span> |
| <span class="sd">"""Return a copy of the array with chosen storage type.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray or CSRNDArray</span> |
| <span class="sd"> A copy of the array with the chosen storage stype</span> |
| <span class="sd"> """</span> |
| <span class="c1"># pylint: disable= no-member, protected-access</span> |
| <span class="k">if</span> <span class="n">stype</span> <span class="o">==</span> <span class="s1">'row_sparse'</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"cast_storage from csr to row_sparse is not supported"</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">op</span><span class="o">.</span><span class="n">cast_storage</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">stype</span><span class="o">=</span><span class="n">stype</span><span class="p">)</span> |
| <span class="c1"># pylint: enable= no-member, protected-access</span> |
| |
| <span class="k">def</span> <span class="nf">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="sd">"""Copies the value of this array to another array.</span> |
| |
| <span class="sd"> If ``other`` is a ``NDArray`` or ``CSRNDArray`` object, then ``other.shape`` and</span> |
| <span class="sd"> ``self.shape`` should be the same. This function copies the value from</span> |
| <span class="sd"> ``self`` to ``other``.</span> |
| |
| <span class="sd"> If ``other`` is a context, a new ``CSRNDArray`` will be first created on</span> |
| <span class="sd"> the target context, and the value of ``self`` is copied.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> other : NDArray or CSRNDArray or Context</span> |
| <span class="sd"> The destination array or context.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray or CSRNDArray</span> |
| <span class="sd"> The copied array. If ``other`` is an ``NDArray`` or ``CSRNDArray``, then the return</span> |
| <span class="sd"> value and ``other`` will point to the same ``NDArray`` or ``CSRNDArray``.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">Context</span><span class="p">):</span> |
| <span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">CSRNDArray</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="n">other</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="n">stype</span> <span class="o">=</span> <span class="n">other</span><span class="o">.</span><span class="n">stype</span> |
| <span class="k">if</span> <span class="n">stype</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'default'</span><span class="p">,</span> <span class="s1">'csr'</span><span class="p">):</span> |
| <span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">CSRNDArray</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="n">other</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'copyto does not support destination NDArray stype '</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">stype</span><span class="p">))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'copyto does not support type '</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">other</span><span class="p">)))</span> |
| |
| <span class="k">def</span> <span class="nf">asscipy</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Returns a ``scipy.sparse.csr.csr_matrix`` object with value copied from this array</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> x = mx.nd.sparse.zeros('csr', (2,3))</span> |
| <span class="sd"> >>> y = x.asscipy()</span> |
| <span class="sd"> >>> type(y)</span> |
| <span class="sd"> <type 'scipy.sparse.csr.csr_matrix'></span> |
| <span class="sd"> >>> y</span> |
| <span class="sd"> <2x3 sparse matrix of type '<type 'numpy.float32'>'</span> |
| <span class="sd"> with 0 stored elements in Compressed Sparse Row format></span> |
| <span class="sd"> """</span> |
| <span class="n">data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="o">.</span><span class="n">asnumpy</span><span class="p">()</span> |
| <span class="n">indices</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">indices</span><span class="o">.</span><span class="n">asnumpy</span><span class="p">()</span> |
| <span class="n">indptr</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">indptr</span><span class="o">.</span><span class="n">asnumpy</span><span class="p">()</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">spsp</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ImportError</span><span class="p">(</span><span class="s2">"scipy is not available. </span><span class="se">\</span> |
| <span class="s2"> Please check if the scipy python bindings are installed."</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">spsp</span><span class="o">.</span><span class="n">csr_matrix</span><span class="p">((</span><span class="n">data</span><span class="p">,</span> <span class="n">indices</span><span class="p">,</span> <span class="n">indptr</span><span class="p">),</span> <span class="n">shape</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">dtype</span><span class="p">)</span> |
| |
| <span class="c1"># pylint: disable=abstract-method</span> |
| <span class="k">class</span> <span class="nc">RowSparseNDArray</span><span class="p">(</span><span class="n">BaseSparseNDArray</span><span class="p">):</span> |
| <span class="sd">"""A sparse representation of a set of NDArray row slices at given indices.</span> |
| |
| <span class="sd"> A RowSparseNDArray represents a multidimensional NDArray using two separate arrays: `data` and</span> |
| <span class="sd"> `indices`. The number of dimensions has to be at least 2.</span> |
| |
| <span class="sd"> - data: an NDArray of any dtype with shape [D0, D1, ..., Dn].</span> |
| <span class="sd"> - indices: a 1-D int64 NDArray with shape [D0] with values sorted in ascending order.</span> |
| |
| <span class="sd"> The `indices` stores the indices of the row slices with non-zeros,</span> |
| <span class="sd"> while the values are stored in `data`. The corresponding NDArray ``dense``</span> |
| <span class="sd"> represented by RowSparseNDArray ``rsp`` has</span> |
| |
| <span class="sd"> ``dense[rsp.indices[i], :, :, :, ...] = rsp.data[i, :, :, :, ...]``</span> |
| |
| <span class="sd"> >>> dense.asnumpy()</span> |
| <span class="sd"> array([[ 1., 2., 3.],</span> |
| <span class="sd"> [ 0., 0., 0.],</span> |
| <span class="sd"> [ 4., 0., 5.],</span> |
| <span class="sd"> [ 0., 0., 0.],</span> |
| <span class="sd"> [ 0., 0., 0.]], dtype=float32)</span> |
| <span class="sd"> >>> rsp = dense.tostype('row_sparse')</span> |
| <span class="sd"> >>> rsp.indices.asnumpy()</span> |
| <span class="sd"> array([0, 2], dtype=int64)</span> |
| <span class="sd"> >>> rsp.data.asnumpy()</span> |
| <span class="sd"> array([[ 1., 2., 3.],</span> |
| <span class="sd"> [ 4., 0., 5.]], dtype=float32)</span> |
| |
| <span class="sd"> A RowSparseNDArray is typically used to represent non-zero row slices of a large NDArray</span> |
| <span class="sd"> of shape [LARGE0, D1, .. , Dn] where LARGE0 >> D0 and most row slices are zeros.</span> |
| |
| <span class="sd"> RowSparseNDArray is used principally in the definition of gradients for operations</span> |
| <span class="sd"> that have sparse gradients (e.g. sparse dot and sparse embedding).</span> |
| |
| <span class="sd"> See Also</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> row_sparse_array: Several ways to construct a RowSparseNDArray</span> |
| <span class="sd"> """</span> |
| <span class="k">def</span> <span class="nf">__reduce__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">RowSparseNDArray</span><span class="p">,</span> <span class="p">(</span><span class="kc">None</span><span class="p">,),</span> <span class="nb">super</span><span class="p">(</span><span class="n">RowSparseNDArray</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__getstate__</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">__iadd__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="p">(</span><span class="bp">self</span> <span class="o">+</span> <span class="n">other</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| |
| <span class="k">def</span> <span class="nf">__isub__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="p">(</span><span class="bp">self</span> <span class="o">-</span> <span class="n">other</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| |
| <span class="k">def</span> <span class="nf">__imul__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="p">(</span><span class="bp">self</span> <span class="o">*</span> <span class="n">other</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| |
| <span class="k">def</span> <span class="nf">__idiv__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="p">(</span><span class="bp">self</span> <span class="o">/</span> <span class="n">other</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| |
| <span class="k">def</span> <span class="nf">__itruediv__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="p">(</span><span class="bp">self</span> <span class="o">/</span> <span class="n">other</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span> |
| |
| <span class="k">def</span> <span class="nf">__getitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span> |
| <span class="sd">"""x.__getitem__(i) <=> x[i]</span> |
| |
| <span class="sd"> Returns a sliced view of this array.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> key : mxnet.ndarray.NDArray.slice</span> |
| <span class="sd"> Indexing key.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> x = mx.nd.sparse.zeros('row_sparse', (2, 3))</span> |
| <span class="sd"> >>> x[:].asnumpy()</span> |
| <span class="sd"> array([[ 0., 0., 0.],</span> |
| <span class="sd"> [ 0., 0., 0.]], dtype=float32)</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="nb">int</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s2">"__getitem__ with int key is not implemented for RowSparseNDArray yet"</span><span class="p">)</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">py_slice</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">key</span><span class="o">.</span><span class="n">step</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">or</span> <span class="n">key</span><span class="o">.</span><span class="n">start</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">or</span> <span class="n">key</span><span class="o">.</span><span class="n">stop</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s1">'RowSparseNDArray only supports [:] for __getitem__'</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="bp">self</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Multi-dimension indexing is not supported'</span><span class="p">)</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Undefined behaviour for </span><span class="si">{}</span><span class="s1">'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">key</span><span class="p">))</span> |
| |
| <span class="k">def</span> <span class="nf">__setitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span> |
| <span class="sd">"""x.__setitem__(i, y) <=> x[i]=y</span> |
| |
| <span class="sd"> Set self[key] to value. Only slice key [:] is supported.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> key : mxnet.ndarray.NDArray.slice</span> |
| <span class="sd"> The indexing key.</span> |
| <span class="sd"> value : NDArray or numpy.ndarray</span> |
| <span class="sd"> The value to set.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> src = mx.nd.row_sparse([[1, 0, 2], [4, 5, 6]], [0, 2], (3,3))</span> |
| <span class="sd"> >>> src.asnumpy()</span> |
| <span class="sd"> array([[ 1., 0., 2.],</span> |
| <span class="sd"> [ 0., 0., 0.],</span> |
| <span class="sd"> [ 4., 5., 6.]], dtype=float32)</span> |
| <span class="sd"> >>> # assign RowSparseNDArray with same storage type</span> |
| <span class="sd"> >>> x = mx.nd.sparse.zeros('row_sparse', (3,3))</span> |
| <span class="sd"> >>> x[:] = src</span> |
| <span class="sd"> >>> x.asnumpy()</span> |
| <span class="sd"> array([[ 1., 0., 2.],</span> |
| <span class="sd"> [ 0., 0., 0.],</span> |
| <span class="sd"> [ 4., 5., 6.]], dtype=float32)</span> |
| <span class="sd"> >>> # assign NDArray to RowSparseNDArray</span> |
| <span class="sd"> >>> x[:] = mx.nd.ones((3,3))</span> |
| <span class="sd"> >>> x.asnumpy()</span> |
| <span class="sd"> array([[ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> """</span> |
| <span class="c1"># pylint: disable= no-member, protected-access</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">writable</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Failed to assign to a readonly RowSparseNDArray'</span><span class="p">)</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">py_slice</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">key</span><span class="o">.</span><span class="n">step</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">or</span> <span class="n">key</span><span class="o">.</span><span class="n">start</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">or</span> <span class="n">key</span><span class="o">.</span><span class="n">stop</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Assignment with slice for RowSparseNDArray '</span> \ |
| <span class="s1">'is not implmented yet.'</span><span class="p">)</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="c1"># avoid copying to itself</span> |
| <span class="k">if</span> <span class="n">value</span><span class="o">.</span><span class="n">handle</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">handle</span><span class="p">:</span> |
| <span class="n">value</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">numeric_types</span><span class="p">):</span> |
| <span class="n">_internal</span><span class="o">.</span><span class="n">_set_value</span><span class="p">(</span><span class="nb">float</span><span class="p">(</span><span class="n">value</span><span class="p">),</span> <span class="n">out</span><span class="o">=</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">ndarray</span><span class="p">,</span> <span class="n">np</span><span class="o">.</span><span class="n">generic</span><span class="p">)):</span> |
| <span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span><span class="s1">'Assigning non-NDArray object to RowSparseNDArray is not efficient'</span><span class="p">,</span> |
| <span class="ne">RuntimeWarning</span><span class="p">)</span> |
| <span class="n">tmp</span> <span class="o">=</span> <span class="n">_array</span><span class="p">(</span><span class="n">value</span><span class="p">)</span> |
| <span class="n">tmp</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'type </span><span class="si">%s</span><span class="s1"> not supported'</span> <span class="o">%</span> <span class="nb">str</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">value</span><span class="p">)))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">assert</span><span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="p">(</span><span class="nb">int</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">)))</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'RowSparseNDArray only supports [:] for assignment'</span><span class="p">)</span> |
| <span class="c1"># pylint: enable= no-member, protected-access</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">indices</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""A deep copy NDArray of the indices array of the RowSparseNDArray.</span> |
| <span class="sd"> This generates a deep copy of the row indices of the current `row_sparse` matrix.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray</span> |
| <span class="sd"> This RowSparseNDArray's indices array.</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_aux_data</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span> |
| |
| <span class="nd">@property</span> |
| <span class="k">def</span> <span class="nf">data</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""A deep copy NDArray of the data array of the RowSparseNDArray.</span> |
| <span class="sd"> This generates a deep copy of the `data` of the current `row_sparse` matrix.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray</span> |
| <span class="sd"> This RowSparseNDArray's data array.</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_data</span><span class="p">()</span> |
| |
| <span class="nd">@indices</span><span class="o">.</span><span class="n">setter</span> |
| <span class="k">def</span> <span class="nf">indices</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">indices</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| <span class="nd">@data</span><span class="o">.</span><span class="n">setter</span> |
| <span class="k">def</span> <span class="nf">data</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span> |
| |
| <span class="k">def</span> <span class="nf">tostype</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">stype</span><span class="p">):</span> |
| <span class="sd">"""Return a copy of the array with chosen storage type.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray or RowSparseNDArray</span> |
| <span class="sd"> A copy of the array with the chosen storage stype</span> |
| <span class="sd"> """</span> |
| <span class="c1"># pylint: disable= no-member, protected-access</span> |
| <span class="k">if</span> <span class="n">stype</span> <span class="o">==</span> <span class="s1">'csr'</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"cast_storage from row_sparse to csr is not supported"</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">op</span><span class="o">.</span><span class="n">cast_storage</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">stype</span><span class="o">=</span><span class="n">stype</span><span class="p">)</span> |
| <span class="c1"># pylint: enable= no-member, protected-access</span> |
| |
| <span class="k">def</span> <span class="nf">copyto</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="sd">"""Copies the value of this array to another array.</span> |
| |
| <span class="sd"> If ``other`` is a ``NDArray`` or ``RowSparseNDArray`` object, then ``other.shape``</span> |
| <span class="sd"> and ``self.shape`` should be the same. This function copies the value from</span> |
| <span class="sd"> ``self`` to ``other``.</span> |
| |
| <span class="sd"> If ``other`` is a context, a new ``RowSparseNDArray`` will be first created on</span> |
| <span class="sd"> the target context, and the value of ``self`` is copied.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> other : NDArray or RowSparseNDArray or Context</span> |
| <span class="sd"> The destination array or context.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray or RowSparseNDArray</span> |
| <span class="sd"> The copied array. If ``other`` is an ``NDArray`` or ``RowSparseNDArray``, then the</span> |
| <span class="sd"> return value and ``other`` will point to the same ``NDArray`` or ``RowSparseNDArray``.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">Context</span><span class="p">):</span> |
| <span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">RowSparseNDArray</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="n">other</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="n">stype</span> <span class="o">=</span> <span class="n">other</span><span class="o">.</span><span class="n">stype</span> |
| <span class="k">if</span> <span class="n">stype</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'default'</span><span class="p">,</span> <span class="s1">'row_sparse'</span><span class="p">):</span> |
| <span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">RowSparseNDArray</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">copyto</span><span class="p">(</span><span class="n">other</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'copyto does not support destination NDArray stype '</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">stype</span><span class="p">))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'copyto does not support type '</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="n">other</span><span class="p">)))</span> |
| |
| <span class="k">def</span> <span class="nf">retain</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="sd">"""Convenience fluent method for :py:func:`retain`.</span> |
| |
| <span class="sd"> The arguments are the same as for :py:func:`retain`, with</span> |
| <span class="sd"> this array as data.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">gs_retain</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ImportError</span><span class="p">(</span><span class="s2">"gen_sparse could not be imported"</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">gs_retain</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">_prepare_src_array</span><span class="p">(</span><span class="n">source_array</span><span class="p">,</span> <span class="n">dtype</span><span class="p">):</span> |
| <span class="sd">"""Prepare `source_array` so that it can be used to construct NDArray.</span> |
| <span class="sd"> `source_array` is converted to a `np.ndarray` if it's neither an `NDArray` \</span> |
| <span class="sd"> nor an `np.ndarray`.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source_array</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source_array</span><span class="p">,</span> <span class="n">np</span><span class="o">.</span><span class="n">ndarray</span><span class="p">):</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">source_array</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">array</span><span class="p">(</span><span class="n">source_array</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">except</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'values must be array like object'</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">source_array</span> |
| |
| <span class="k">def</span> <span class="nf">_prepare_default_dtype</span><span class="p">(</span><span class="n">src_array</span><span class="p">,</span> <span class="n">dtype</span><span class="p">):</span> |
| <span class="sd">"""Prepare the value of dtype if `dtype` is None. If `src_array` is an NDArray, numpy.ndarray</span> |
| <span class="sd"> or scipy.sparse.csr.csr_matrix, return src_array.dtype. float32 is returned otherwise."""</span> |
| <span class="k">if</span> <span class="n">dtype</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">src_array</span><span class="p">,</span> <span class="p">(</span><span class="n">NDArray</span><span class="p">,</span> <span class="n">np</span><span class="o">.</span><span class="n">ndarray</span><span class="p">)):</span> |
| <span class="n">dtype</span> <span class="o">=</span> <span class="n">src_array</span><span class="o">.</span><span class="n">dtype</span> |
| <span class="k">elif</span> <span class="n">spsp</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">src_array</span><span class="p">,</span> <span class="n">spsp</span><span class="o">.</span><span class="n">csr</span><span class="o">.</span><span class="n">csr_matrix</span><span class="p">):</span> |
| <span class="n">dtype</span> <span class="o">=</span> <span class="n">src_array</span><span class="o">.</span><span class="n">dtype</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">dtype</span> <span class="o">=</span> <span class="n">mx_real_t</span> |
| <span class="k">return</span> <span class="n">dtype</span> |
| |
| <span class="k">def</span> <span class="nf">_check_shape</span><span class="p">(</span><span class="n">s1</span><span class="p">,</span> <span class="n">s2</span><span class="p">):</span> |
| <span class="sd">"""check s1 == s2 if both are not None"""</span> |
| <span class="k">if</span> <span class="n">s1</span> <span class="ow">and</span> <span class="n">s2</span> <span class="ow">and</span> <span class="n">s1</span> <span class="o">!=</span> <span class="n">s2</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Shape mismatch detected. "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">s1</span><span class="p">)</span> <span class="o">+</span> <span class="s2">" v.s. "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">s2</span><span class="p">))</span> |
| |
| <span class="k">def</span> <span class="nf">csr_matrix</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">shape</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""Creates a `CSRNDArray`, an 2D array with compressed sparse row (CSR) format.</span> |
| |
| <span class="sd"> The CSRNDArray can be instantiated in several ways:</span> |
| |
| <span class="sd"> - csr_matrix(D):</span> |
| <span class="sd"> to construct a CSRNDArray with a dense 2D array ``D``</span> |
| <span class="sd"> - **D** (*array_like*) - An object exposing the array interface, an object whose \</span> |
| <span class="sd"> `__array__` method returns an array, or any (nested) sequence.</span> |
| <span class="sd"> - **ctx** (*Context, optional*) - Device context \</span> |
| <span class="sd"> (default is the current default context).</span> |
| <span class="sd"> - **dtype** (*str or numpy.dtype, optional*) - The data type of the output array. \</span> |
| <span class="sd"> The default dtype is ``D.dtype`` if ``D`` is an NDArray or numpy.ndarray, \</span> |
| <span class="sd"> float32 otherwise.</span> |
| |
| <span class="sd"> - csr_matrix(S)</span> |
| <span class="sd"> to construct a CSRNDArray with a sparse 2D array ``S``</span> |
| <span class="sd"> - **S** (*CSRNDArray or scipy.sparse.csr.csr_matrix*) - A sparse matrix.</span> |
| <span class="sd"> - **ctx** (*Context, optional*) - Device context \</span> |
| <span class="sd"> (default is the current default context).</span> |
| <span class="sd"> - **dtype** (*str or numpy.dtype, optional*) - The data type of the output array. \</span> |
| <span class="sd"> The default dtype is ``S.dtype``.</span> |
| |
| <span class="sd"> - csr_matrix((M, N))</span> |
| <span class="sd"> to construct an empty CSRNDArray with shape ``(M, N)``</span> |
| <span class="sd"> - **M** (*int*) - Number of rows in the matrix</span> |
| <span class="sd"> - **N** (*int*) - Number of columns in the matrix</span> |
| <span class="sd"> - **ctx** (*Context, optional*) - Device context \</span> |
| <span class="sd"> (default is the current default context).</span> |
| <span class="sd"> - **dtype** (*str or numpy.dtype, optional*) - The data type of the output array. \</span> |
| <span class="sd"> The default dtype is float32.</span> |
| |
| <span class="sd"> - csr_matrix((data, indices, indptr))</span> |
| <span class="sd"> to construct a CSRNDArray based on the definition of compressed sparse row format \</span> |
| <span class="sd"> using three separate arrays, \</span> |
| <span class="sd"> where the column indices for row i are stored in ``indices[indptr[i]:indptr[i+1]]`` \</span> |
| <span class="sd"> and their corresponding values are stored in ``data[indptr[i]:indptr[i+1]]``. \</span> |
| <span class="sd"> The column indices for a given row are expected to be **sorted in ascending order.** \</span> |
| <span class="sd"> Duplicate column entries for the same row are not allowed.</span> |
| <span class="sd"> - **data** (*array_like*) - An object exposing the array interface, which \</span> |
| <span class="sd"> holds all the non-zero entries of the matrix in row-major order.</span> |
| <span class="sd"> - **indices** (*array_like*) - An object exposing the array interface, which \</span> |
| <span class="sd"> stores the column index for each non-zero element in ``data``.</span> |
| <span class="sd"> - **indptr** (*array_like*) - An object exposing the array interface, which \</span> |
| <span class="sd"> stores the offset into ``data`` of the first non-zero element number of each \</span> |
| <span class="sd"> row of the matrix.</span> |
| <span class="sd"> - **shape** (*tuple of int, optional*) - The shape of the array. The default \</span> |
| <span class="sd"> shape is inferred from the indices and indptr arrays.</span> |
| <span class="sd"> - **ctx** (*Context, optional*) - Device context \</span> |
| <span class="sd"> (default is the current default context).</span> |
| <span class="sd"> - **dtype** (*str or numpy.dtype, optional*) - The data type of the output array. \</span> |
| <span class="sd"> The default dtype is ``data.dtype`` if ``data`` is an NDArray or numpy.ndarray, \</span> |
| <span class="sd"> float32 otherwise.</span> |
| |
| <span class="sd"> - csr_matrix((data, (row, col)))</span> |
| <span class="sd"> to construct a CSRNDArray based on the COOrdinate format \</span> |
| <span class="sd"> using three seperate arrays, \</span> |
| <span class="sd"> where ``row[i]`` is the row index of the element, \</span> |
| <span class="sd"> ``col[i]`` is the column index of the element \</span> |
| <span class="sd"> and ``data[i]`` is the data corresponding to the element. All the missing \</span> |
| <span class="sd"> elements in the input are taken to be zeroes.</span> |
| <span class="sd"> - **data** (*array_like*) - An object exposing the array interface, which \</span> |
| <span class="sd"> holds all the non-zero entries of the matrix in COO format.</span> |
| <span class="sd"> - **row** (*array_like*) - An object exposing the array interface, which \</span> |
| <span class="sd"> stores the row index for each non zero element in ``data``.</span> |
| <span class="sd"> - **col** (*array_like*) - An object exposing the array interface, which \</span> |
| <span class="sd"> stores the col index for each non zero element in ``data``.</span> |
| <span class="sd"> - **shape** (*tuple of int, optional*) - The shape of the array. The default \</span> |
| <span class="sd"> shape is inferred from the ``row`` and ``col`` arrays.</span> |
| <span class="sd"> - **ctx** (*Context, optional*) - Device context \</span> |
| <span class="sd"> (default is the current default context).</span> |
| <span class="sd"> - **dtype** (*str or numpy.dtype, optional*) - The data type of the output array. \</span> |
| <span class="sd"> The default dtype is float32.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> arg1: tuple of int, tuple of array_like, array_like, CSRNDArray, scipy.sparse.csr_matrix, \</span> |
| <span class="sd"> scipy.sparse.coo_matrix, tuple of int or tuple of array_like</span> |
| <span class="sd"> The argument to help instantiate the csr matrix. See above for further details.</span> |
| <span class="sd"> shape : tuple of int, optional</span> |
| <span class="sd"> The shape of the csr matrix.</span> |
| <span class="sd"> ctx: Context, optional</span> |
| <span class="sd"> Device context (default is the current default context).</span> |
| <span class="sd"> dtype: str or numpy.dtype, optional</span> |
| <span class="sd"> The data type of the output array.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> CSRNDArray</span> |
| <span class="sd"> A `CSRNDArray` with the `csr` storage representation.</span> |
| |
| <span class="sd"> Example</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> >>> a = mx.nd.sparse.csr_matrix(([1, 2, 3], [1, 0, 2], [0, 1, 2, 2, 3]), shape=(4, 3))</span> |
| <span class="sd"> >>> a.asnumpy()</span> |
| <span class="sd"> array([[ 0., 1., 0.],</span> |
| <span class="sd"> [ 2., 0., 0.],</span> |
| <span class="sd"> [ 0., 0., 0.],</span> |
| <span class="sd"> [ 0., 0., 3.]], dtype=float32)</span> |
| |
| <span class="sd"> See Also</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> CSRNDArray : MXNet NDArray in compressed sparse row format.</span> |
| <span class="sd"> """</span> |
| <span class="c1"># construct a csr matrix from (M, N) or (data, indices, indptr)</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">):</span> |
| <span class="n">arg_len</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">arg1</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">arg_len</span> <span class="o">==</span> <span class="mi">2</span><span class="p">:</span> |
| <span class="c1"># construct a sparse csr matrix from</span> |
| <span class="c1"># scipy coo matrix if input format is coo</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg1</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="nb">tuple</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">arg1</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span> <span class="o">==</span> <span class="mi">2</span><span class="p">:</span> |
| <span class="n">data</span><span class="p">,</span> <span class="p">(</span><span class="n">row</span><span class="p">,</span> <span class="n">col</span><span class="p">)</span> <span class="o">=</span> <span class="n">arg1</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="n">data</span> <span class="o">=</span> <span class="n">data</span><span class="o">.</span><span class="n">asnumpy</span><span class="p">()</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">row</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="n">row</span> <span class="o">=</span> <span class="n">row</span><span class="o">.</span><span class="n">asnumpy</span><span class="p">()</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">col</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="n">col</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">asnumpy</span><span class="p">()</span> |
| <span class="n">coo</span> <span class="o">=</span> <span class="n">spsp</span><span class="o">.</span><span class="n">coo_matrix</span><span class="p">((</span><span class="n">data</span><span class="p">,</span> <span class="p">(</span><span class="n">row</span><span class="p">,</span> <span class="n">col</span><span class="p">)),</span> <span class="n">shape</span><span class="o">=</span><span class="n">shape</span><span class="p">)</span> |
| <span class="n">_check_shape</span><span class="p">(</span><span class="n">coo</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">shape</span><span class="p">)</span> |
| <span class="n">csr</span> <span class="o">=</span> <span class="n">coo</span><span class="o">.</span><span class="n">tocsr</span><span class="p">()</span> |
| <span class="k">return</span> <span class="n">array</span><span class="p">(</span><span class="n">csr</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="c1"># empty matrix with shape</span> |
| <span class="n">_check_shape</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">shape</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">empty</span><span class="p">(</span><span class="s1">'csr'</span><span class="p">,</span> <span class="n">arg1</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="n">arg_len</span> <span class="o">==</span> <span class="mi">3</span><span class="p">:</span> |
| <span class="c1"># data, indices, indptr</span> |
| <span class="k">return</span> <span class="n">_csr_matrix_from_definition</span><span class="p">(</span><span class="n">arg1</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">arg1</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">arg1</span><span class="p">[</span><span class="mi">2</span><span class="p">],</span> <span class="n">shape</span><span class="o">=</span><span class="n">shape</span><span class="p">,</span> |
| <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Unexpected length of input tuple: "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">arg_len</span><span class="p">))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="c1"># construct a csr matrix from a sparse / dense one</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">CSRNDArray</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="n">spsp</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">spsp</span><span class="o">.</span><span class="n">csr</span><span class="o">.</span><span class="n">csr_matrix</span><span class="p">)):</span> |
| <span class="c1"># construct a csr matrix from scipy or CSRNDArray</span> |
| <span class="n">_check_shape</span><span class="p">(</span><span class="n">arg1</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">shape</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">array</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">RowSparseNDArray</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Unexpected input type: RowSparseNDArray"</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="c1"># construct a csr matrix from a dense one</span> |
| <span class="c1"># prepare default ctx and dtype since mx.nd.array doesn't use default values</span> |
| <span class="c1"># based on source_array</span> |
| <span class="n">dtype</span> <span class="o">=</span> <span class="n">_prepare_default_dtype</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">dtype</span><span class="p">)</span> |
| <span class="c1"># create dns array with provided dtype. ctx is not passed since copy across</span> |
| <span class="c1"># ctx requires dtype to be the same</span> |
| <span class="n">dns</span> <span class="o">=</span> <span class="n">_array</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">ctx</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">dns</span><span class="o">.</span><span class="n">context</span> <span class="o">!=</span> <span class="n">ctx</span><span class="p">:</span> |
| <span class="n">dns</span> <span class="o">=</span> <span class="n">dns</span><span class="o">.</span><span class="n">as_in_context</span><span class="p">(</span><span class="n">ctx</span><span class="p">)</span> |
| <span class="n">_check_shape</span><span class="p">(</span><span class="n">dns</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">shape</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">dns</span><span class="o">.</span><span class="n">tostype</span><span class="p">(</span><span class="s1">'csr'</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">_csr_matrix_from_definition</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">indices</span><span class="p">,</span> <span class="n">indptr</span><span class="p">,</span> <span class="n">shape</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">dtype</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">indices_type</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">indptr_type</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""Create a `CSRNDArray` based on data, indices and indptr"""</span> |
| <span class="c1"># pylint: disable= no-member, protected-access</span> |
| <span class="n">storage_type</span> <span class="o">=</span> <span class="s1">'csr'</span> |
| <span class="c1"># context</span> |
| <span class="n">ctx</span> <span class="o">=</span> <span class="n">current_context</span><span class="p">()</span> <span class="k">if</span> <span class="n">ctx</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">ctx</span> |
| <span class="c1"># types</span> |
| <span class="n">dtype</span> <span class="o">=</span> <span class="n">_prepare_default_dtype</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">dtype</span><span class="p">)</span> |
| <span class="n">indptr_type</span> <span class="o">=</span> <span class="n">_STORAGE_AUX_TYPES</span><span class="p">[</span><span class="n">storage_type</span><span class="p">][</span><span class="mi">0</span><span class="p">]</span> <span class="k">if</span> <span class="n">indptr_type</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">indptr_type</span> |
| <span class="n">indices_type</span> <span class="o">=</span> <span class="n">_STORAGE_AUX_TYPES</span><span class="p">[</span><span class="n">storage_type</span><span class="p">][</span><span class="mi">1</span><span class="p">]</span> <span class="k">if</span> <span class="n">indices_type</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">indices_type</span> |
| <span class="c1"># prepare src array and types</span> |
| <span class="n">data</span> <span class="o">=</span> <span class="n">_prepare_src_array</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">dtype</span><span class="p">)</span> |
| <span class="n">indptr</span> <span class="o">=</span> <span class="n">_prepare_src_array</span><span class="p">(</span><span class="n">indptr</span><span class="p">,</span> <span class="n">indptr_type</span><span class="p">)</span> |
| <span class="n">indices</span> <span class="o">=</span> <span class="n">_prepare_src_array</span><span class="p">(</span><span class="n">indices</span><span class="p">,</span> <span class="n">indices_type</span><span class="p">)</span> |
| |
| <span class="c1"># TODO(junwu): Convert data, indptr, and indices to mxnet NDArrays</span> |
| <span class="c1"># if they are not for now. In the future, we should provide a c-api</span> |
| <span class="c1"># to accept np.ndarray types to copy from to result.data and aux_data</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="n">data</span> <span class="o">=</span> <span class="n">_array</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">indptr</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="n">indptr</span> <span class="o">=</span> <span class="n">_array</span><span class="p">(</span><span class="n">indptr</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="n">indptr_type</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">indices</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="n">indices</span> <span class="o">=</span> <span class="n">_array</span><span class="p">(</span><span class="n">indices</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="n">indices_type</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">shape</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">indices</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'invalid shape'</span><span class="p">)</span> |
| <span class="n">shape</span> <span class="o">=</span> <span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">indptr</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">,</span> <span class="n">op</span><span class="o">.</span><span class="n">max</span><span class="p">(</span><span class="n">indices</span><span class="p">)</span><span class="o">.</span><span class="n">asscalar</span><span class="p">()</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> |
| <span class="c1"># verify shapes</span> |
| <span class="n">aux_shapes</span> <span class="o">=</span> <span class="p">[</span><span class="n">indptr</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">indices</span><span class="o">.</span><span class="n">shape</span><span class="p">]</span> |
| <span class="k">if</span> <span class="n">data</span><span class="o">.</span><span class="n">ndim</span> <span class="o">!=</span> <span class="mi">1</span> <span class="ow">or</span> <span class="n">indptr</span><span class="o">.</span><span class="n">ndim</span> <span class="o">!=</span> <span class="mi">1</span> <span class="ow">or</span> <span class="n">indices</span><span class="o">.</span><span class="n">ndim</span> <span class="o">!=</span> <span class="mi">1</span> <span class="ow">or</span> \ |
| <span class="n">indptr</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="mi">0</span> <span class="ow">or</span> <span class="nb">len</span><span class="p">(</span><span class="n">shape</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">2</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'invalid shape'</span><span class="p">)</span> |
| <span class="n">result</span> <span class="o">=</span> <span class="n">CSRNDArray</span><span class="p">(</span><span class="n">_new_alloc_handle</span><span class="p">(</span><span class="n">storage_type</span><span class="p">,</span> <span class="n">shape</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="n">dtype</span><span class="p">,</span> |
| <span class="p">[</span><span class="n">indptr_type</span><span class="p">,</span> <span class="n">indices_type</span><span class="p">],</span> <span class="n">aux_shapes</span><span class="p">))</span> |
| <span class="n">check_call</span><span class="p">(</span><span class="n">_LIB</span><span class="o">.</span><span class="n">MXNDArraySyncCopyFromNDArray</span><span class="p">(</span><span class="n">result</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">data</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">)))</span> |
| <span class="n">check_call</span><span class="p">(</span><span class="n">_LIB</span><span class="o">.</span><span class="n">MXNDArraySyncCopyFromNDArray</span><span class="p">(</span><span class="n">result</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">indptr</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">(</span><span class="mi">0</span><span class="p">)))</span> |
| <span class="n">check_call</span><span class="p">(</span><span class="n">_LIB</span><span class="o">.</span><span class="n">MXNDArraySyncCopyFromNDArray</span><span class="p">(</span><span class="n">result</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">indices</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">(</span><span class="mi">1</span><span class="p">)))</span> |
| <span class="k">return</span> <span class="n">result</span> |
| <span class="c1"># pylint: enable= no-member, protected-access</span> |
| |
| <div class="viewcode-block" id="row_sparse_array"><a class="viewcode-back" href="../../../api/ndarray/_autogen/mxnet.ndarray.sparse.row_sparse_array.html#mxnet.ndarray.sparse.row_sparse_array">[docs]</a><span class="k">def</span> <span class="nf">row_sparse_array</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">shape</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""Creates a `RowSparseNDArray`, a multidimensional row sparse array with a set of \</span> |
| <span class="sd"> tensor slices at given indices.</span> |
| |
| <span class="sd"> The RowSparseNDArray can be instantiated in several ways:</span> |
| |
| <span class="sd"> - row_sparse_array(D):</span> |
| <span class="sd"> to construct a RowSparseNDArray with a dense ndarray ``D``</span> |
| <span class="sd"> - **D** (*array_like*) - An object exposing the array interface, an object whose \</span> |
| <span class="sd"> `__array__` method returns an array, or any (nested) sequence.</span> |
| <span class="sd"> - **ctx** (*Context, optional*) - Device context \</span> |
| <span class="sd"> (default is the current default context).</span> |
| <span class="sd"> - **dtype** (*str or numpy.dtype, optional*) - The data type of the output array. \</span> |
| <span class="sd"> The default dtype is ``D.dtype`` if ``D`` is an NDArray or numpy.ndarray, \</span> |
| <span class="sd"> float32 otherwise.</span> |
| |
| <span class="sd"> - row_sparse_array(S)</span> |
| <span class="sd"> to construct a RowSparseNDArray with a sparse ndarray ``S``</span> |
| <span class="sd"> - **S** (*RowSparseNDArray*) - A sparse ndarray.</span> |
| <span class="sd"> - **ctx** (*Context, optional*) - Device context \</span> |
| <span class="sd"> (default is the current default context).</span> |
| <span class="sd"> - **dtype** (*str or numpy.dtype, optional*) - The data type of the output array. \</span> |
| <span class="sd"> The default dtype is ``S.dtype``.</span> |
| |
| <span class="sd"> - row_sparse_array((D0, D1 .. Dn))</span> |
| <span class="sd"> to construct an empty RowSparseNDArray with shape ``(D0, D1, ... Dn)``</span> |
| <span class="sd"> - **D0, D1 .. Dn** (*int*) - The shape of the ndarray</span> |
| <span class="sd"> - **ctx** (*Context, optional*) - Device context \</span> |
| <span class="sd"> (default is the current default context).</span> |
| <span class="sd"> - **dtype** (*str or numpy.dtype, optional*) - The data type of the output array. \</span> |
| <span class="sd"> The default dtype is float32.</span> |
| |
| <span class="sd"> - row_sparse_array((data, indices))</span> |
| <span class="sd"> to construct a RowSparseNDArray based on the definition of row sparse format \</span> |
| <span class="sd"> using two separate arrays, \</span> |
| <span class="sd"> where the `indices` stores the indices of the row slices with non-zeros,</span> |
| <span class="sd"> while the values are stored in `data`. The corresponding NDArray ``dense``</span> |
| <span class="sd"> represented by RowSparseNDArray ``rsp`` has \</span> |
| <span class="sd"> ``dense[rsp.indices[i], :, :, :, ...] = rsp.data[i, :, :, :, ...]``</span> |
| <span class="sd"> The row indices for are expected to be **sorted in ascending order.** \</span> |
| <span class="sd"> - **data** (*array_like*) - An object exposing the array interface, which \</span> |
| <span class="sd"> holds all the non-zero row slices of the array.</span> |
| <span class="sd"> - **indices** (*array_like*) - An object exposing the array interface, which \</span> |
| <span class="sd"> stores the row index for each row slice with non-zero elements.</span> |
| <span class="sd"> - **shape** (*tuple of int, optional*) - The shape of the array. The default \</span> |
| <span class="sd"> shape is inferred from the indices and indptr arrays.</span> |
| <span class="sd"> - **ctx** (*Context, optional*) - Device context \</span> |
| <span class="sd"> (default is the current default context).</span> |
| <span class="sd"> - **dtype** (*str or numpy.dtype, optional*) - The data type of the output array. \</span> |
| <span class="sd"> The default dtype is float32.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> arg1 : NDArray, numpy.ndarray, RowSparseNDArray, tuple of int or tuple of array_like</span> |
| <span class="sd"> The argument to help instantiate the row sparse ndarray. See above for further details.</span> |
| <span class="sd"> shape : tuple of int, optional</span> |
| <span class="sd"> The shape of the row sparse ndarray. (Default value = None)</span> |
| <span class="sd"> ctx : Context, optional</span> |
| <span class="sd"> Device context (default is the current default context).</span> |
| <span class="sd"> dtype : str or numpy.dtype, optional</span> |
| <span class="sd"> The data type of the output array. (Default value = None)</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> RowSparseNDArray</span> |
| <span class="sd"> An `RowSparseNDArray` with the `row_sparse` storage representation.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> a = mx.nd.sparse.row_sparse_array(([[1, 2], [3, 4]], [1, 4]), shape=(6, 2))</span> |
| <span class="sd"> >>> a.asnumpy()</span> |
| <span class="sd"> array([[ 0., 0.],</span> |
| <span class="sd"> [ 1., 2.],</span> |
| <span class="sd"> [ 0., 0.],</span> |
| <span class="sd"> [ 0., 0.],</span> |
| <span class="sd"> [ 3., 4.],</span> |
| <span class="sd"> [ 0., 0.]], dtype=float32)</span> |
| |
| <span class="sd"> See Also</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> RowSparseNDArray : MXNet NDArray in row sparse format.</span> |
| <span class="sd"> """</span> |
| <span class="c1"># construct a row sparse array from (D0, D1 ..) or (data, indices)</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">):</span> |
| <span class="n">arg_len</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">arg1</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">arg_len</span> <span class="o"><</span> <span class="mi">2</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Unexpected length of input tuple: "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">arg_len</span><span class="p">))</span> |
| <span class="k">if</span> <span class="n">arg_len</span> <span class="o">></span> <span class="mi">2</span><span class="p">:</span> |
| <span class="c1"># empty ndarray with shape</span> |
| <span class="n">_check_shape</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">shape</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">empty</span><span class="p">(</span><span class="s1">'row_sparse'</span><span class="p">,</span> <span class="n">arg1</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="c1"># len(arg1) = 2, is either shape or (data, indices)</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg1</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">integer_types</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg1</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">integer_types</span><span class="p">):</span> |
| <span class="c1"># empty ndarray with shape</span> |
| <span class="n">_check_shape</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">shape</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">empty</span><span class="p">(</span><span class="s1">'row_sparse'</span><span class="p">,</span> <span class="n">arg1</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="c1"># data, indices, indptr</span> |
| <span class="k">return</span> <span class="n">_row_sparse_ndarray_from_definition</span><span class="p">(</span><span class="n">arg1</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">arg1</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">shape</span><span class="o">=</span><span class="n">shape</span><span class="p">,</span> |
| <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="c1"># construct a row sparse ndarray from a dense / sparse array</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">RowSparseNDArray</span><span class="p">):</span> |
| <span class="c1"># construct a row sparse ndarray from RowSparseNDArray</span> |
| <span class="n">_check_shape</span><span class="p">(</span><span class="n">arg1</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">shape</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">array</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">CSRNDArray</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Unexpected input type: CSRNDArray"</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="c1"># construct a csr matrix from a dense one</span> |
| <span class="c1"># prepare default dtype since mx.nd.array doesn't use default values</span> |
| <span class="c1"># based on source_array</span> |
| <span class="n">dtype</span> <span class="o">=</span> <span class="n">_prepare_default_dtype</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">dtype</span><span class="p">)</span> |
| <span class="c1"># create dns array with provided dtype. ctx is not passed since copy across</span> |
| <span class="c1"># ctx requires dtype to be the same</span> |
| <span class="n">dns</span> <span class="o">=</span> <span class="n">_array</span><span class="p">(</span><span class="n">arg1</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">ctx</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">dns</span><span class="o">.</span><span class="n">context</span> <span class="o">!=</span> <span class="n">ctx</span><span class="p">:</span> |
| <span class="n">dns</span> <span class="o">=</span> <span class="n">dns</span><span class="o">.</span><span class="n">as_in_context</span><span class="p">(</span><span class="n">ctx</span><span class="p">)</span> |
| <span class="n">_check_shape</span><span class="p">(</span><span class="n">dns</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">shape</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">dns</span><span class="o">.</span><span class="n">tostype</span><span class="p">(</span><span class="s1">'row_sparse'</span><span class="p">)</span></div> |
| |
| <span class="k">def</span> <span class="nf">_row_sparse_ndarray_from_definition</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">indices</span><span class="p">,</span> <span class="n">shape</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">dtype</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">indices_type</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""Create a `RowSparseNDArray` based on data and indices"""</span> |
| <span class="n">storage_type</span> <span class="o">=</span> <span class="s1">'row_sparse'</span> |
| <span class="c1"># context</span> |
| <span class="n">ctx</span> <span class="o">=</span> <span class="n">current_context</span><span class="p">()</span> <span class="k">if</span> <span class="n">ctx</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">ctx</span> |
| <span class="c1"># types</span> |
| <span class="n">dtype</span> <span class="o">=</span> <span class="n">_prepare_default_dtype</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">dtype</span><span class="p">)</span> |
| <span class="n">indices_type</span> <span class="o">=</span> <span class="n">_STORAGE_AUX_TYPES</span><span class="p">[</span><span class="n">storage_type</span><span class="p">][</span><span class="mi">0</span><span class="p">]</span> <span class="k">if</span> <span class="n">indices_type</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">indices_type</span> |
| <span class="c1"># prepare src array and types</span> |
| <span class="n">data</span> <span class="o">=</span> <span class="n">_prepare_src_array</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">dtype</span><span class="p">)</span> |
| <span class="n">indices</span> <span class="o">=</span> <span class="n">_prepare_src_array</span><span class="p">(</span><span class="n">indices</span><span class="p">,</span> <span class="n">indices_type</span><span class="p">)</span> |
| |
| <span class="c1"># TODO(junwu): Convert data, indptr, and indices to mxnet NDArrays</span> |
| <span class="c1"># if they are not for now. In the future, we should provide a c-api</span> |
| <span class="c1"># to accept np.ndarray types to copy from to result.data and aux_data</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="n">data</span> <span class="o">=</span> <span class="n">_array</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">indices</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="n">indices</span> <span class="o">=</span> <span class="n">_array</span><span class="p">(</span><span class="n">indices</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="n">indices_type</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">shape</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">num_indices</span> <span class="o">=</span> <span class="n">indices</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> |
| <span class="k">if</span> <span class="n">num_indices</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'invalid shape'</span><span class="p">)</span> |
| <span class="n">dim0</span> <span class="o">=</span> <span class="n">indices</span><span class="p">[</span><span class="n">num_indices</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">asscalar</span><span class="p">()</span> <span class="o">+</span> <span class="mi">1</span> |
| <span class="n">shape</span> <span class="o">=</span> <span class="p">(</span><span class="n">dim0</span><span class="p">,</span> <span class="p">)</span> <span class="o">+</span> <span class="n">data</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">1</span><span class="p">:]</span> |
| <span class="c1"># verify shapes</span> |
| <span class="k">if</span> <span class="n">data</span><span class="o">.</span><span class="n">ndim</span> <span class="o">!=</span> <span class="nb">len</span><span class="p">(</span><span class="n">shape</span><span class="p">)</span> <span class="ow">or</span> <span class="n">indices</span><span class="o">.</span><span class="n">ndim</span> <span class="o">!=</span> <span class="mi">1</span> <span class="ow">or</span> <span class="n">np</span><span class="o">.</span><span class="n">prod</span><span class="p">(</span><span class="n">shape</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"invalid shape"</span><span class="p">)</span> |
| <span class="n">result</span> <span class="o">=</span> <span class="n">RowSparseNDArray</span><span class="p">(</span><span class="n">_new_alloc_handle</span><span class="p">(</span><span class="n">storage_type</span><span class="p">,</span> <span class="n">shape</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="n">dtype</span><span class="p">,</span> |
| <span class="p">[</span><span class="n">indices_type</span><span class="p">],</span> <span class="p">[</span><span class="n">indices</span><span class="o">.</span><span class="n">shape</span><span class="p">]))</span> |
| <span class="n">check_call</span><span class="p">(</span><span class="n">_LIB</span><span class="o">.</span><span class="n">MXNDArraySyncCopyFromNDArray</span><span class="p">(</span><span class="n">result</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">data</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">)))</span> |
| <span class="n">check_call</span><span class="p">(</span><span class="n">_LIB</span><span class="o">.</span><span class="n">MXNDArraySyncCopyFromNDArray</span><span class="p">(</span><span class="n">result</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">indices</span><span class="o">.</span><span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">c_int</span><span class="p">(</span><span class="mi">0</span><span class="p">)))</span> |
| <span class="k">return</span> <span class="n">result</span> |
| |
| <span class="k">def</span> <span class="nf">_ndarray_cls</span><span class="p">(</span><span class="n">handle</span><span class="p">,</span> <span class="n">writable</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">stype</span><span class="o">=</span><span class="n">_STORAGE_TYPE_UNDEFINED</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">stype</span> <span class="o">==</span> <span class="n">_STORAGE_TYPE_UNDEFINED</span><span class="p">:</span> |
| <span class="n">stype</span> <span class="o">=</span> <span class="n">_storage_type</span><span class="p">(</span><span class="n">handle</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">stype</span> <span class="o">==</span> <span class="n">_STORAGE_TYPE_DEFAULT</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">NDArray</span><span class="p">(</span><span class="n">handle</span><span class="p">,</span> <span class="n">writable</span><span class="o">=</span><span class="n">writable</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="n">stype</span> <span class="o">==</span> <span class="n">_STORAGE_TYPE_CSR</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">CSRNDArray</span><span class="p">(</span><span class="n">handle</span><span class="p">,</span> <span class="n">writable</span><span class="o">=</span><span class="n">writable</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="n">stype</span> <span class="o">==</span> <span class="n">_STORAGE_TYPE_ROW_SPARSE</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">RowSparseNDArray</span><span class="p">(</span><span class="n">handle</span><span class="p">,</span> <span class="n">writable</span><span class="o">=</span><span class="n">writable</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s2">"unknown storage type: </span><span class="si">%s</span><span class="s2">"</span><span class="o">%</span><span class="n">stype</span><span class="p">)</span> |
| |
| |
| <span class="n">_set_ndarray_class</span><span class="p">(</span><span class="n">_ndarray_cls</span><span class="p">)</span> |
| |
| |
| <span class="k">def</span> <span class="nf">add</span><span class="p">(</span><span class="n">lhs</span><span class="p">,</span> <span class="n">rhs</span><span class="p">):</span> |
| <span class="sd">"""Returns element-wise sum of the input arrays with broadcasting.</span> |
| |
| <span class="sd"> Equivalent to ``lhs + rhs``, ``mx.nd.broadcast_add(lhs, rhs)`` and</span> |
| <span class="sd"> ``mx.nd.broadcast_plus(lhs, rhs)`` when shapes of lhs and rhs do not</span> |
| <span class="sd"> match. If lhs.shape == rhs.shape, this is equivalent to</span> |
| <span class="sd"> ``mx.nd.elemwise_add(lhs, rhs)``</span> |
| |
| <span class="sd"> .. note::</span> |
| |
| <span class="sd"> If the corresponding dimensions of two arrays have the same size or one of them has size 1,</span> |
| <span class="sd"> then the arrays are broadcastable to a common shape.abs</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> lhs : scalar or mxnet.ndarray.sparse.array</span> |
| <span class="sd"> First array to be added.</span> |
| <span class="sd"> rhs : scalar or mxnet.ndarray.sparse.array</span> |
| <span class="sd"> Second array to be added.</span> |
| <span class="sd"> If ``lhs.shape != rhs.shape``, they must be</span> |
| <span class="sd"> broadcastable to a common shape.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray</span> |
| <span class="sd"> The element-wise sum of the input arrays.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> a = mx.nd.ones((2,3)).tostype('csr')</span> |
| <span class="sd"> >>> b = mx.nd.ones((2,3)).tostype('csr')</span> |
| <span class="sd"> >>> a.asnumpy()</span> |
| <span class="sd"> array([[ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> b.asnumpy()</span> |
| <span class="sd"> array([[ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> (a+b).asnumpy()</span> |
| <span class="sd"> array([[ 2., 2., 2.],</span> |
| <span class="sd"> [ 2., 2., 2.]], dtype=float32)</span> |
| <span class="sd"> >>> c = mx.nd.ones((2,3)).tostype('row_sparse')</span> |
| <span class="sd"> >>> d = mx.nd.ones((2,3)).tostype('row_sparse')</span> |
| <span class="sd"> >>> c.asnumpy()</span> |
| <span class="sd"> array([[ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> d.asnumpy()</span> |
| <span class="sd"> array([[ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> (c+d).asnumpy()</span> |
| <span class="sd"> array([[ 2., 2., 2.],</span> |
| <span class="sd"> [ 2., 2., 2.]], dtype=float32)</span> |
| <span class="sd"> """</span> |
| <span class="c1"># pylint: disable= no-member, protected-access</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">lhs</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">rhs</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">)</span> <span class="ow">and</span> <span class="n">lhs</span><span class="o">.</span><span class="n">shape</span> <span class="o">==</span> <span class="n">rhs</span><span class="o">.</span><span class="n">shape</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">_ufunc_helper</span><span class="p">(</span> |
| <span class="n">lhs</span><span class="p">,</span> |
| <span class="n">rhs</span><span class="p">,</span> |
| <span class="n">op</span><span class="o">.</span><span class="n">elemwise_add</span><span class="p">,</span> |
| <span class="n">operator</span><span class="o">.</span><span class="n">add</span><span class="p">,</span> |
| <span class="n">_internal</span><span class="o">.</span><span class="n">_plus_scalar</span><span class="p">,</span> |
| <span class="kc">None</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="n">_ufunc_helper</span><span class="p">(</span> |
| <span class="n">lhs</span><span class="p">,</span> |
| <span class="n">rhs</span><span class="p">,</span> |
| <span class="n">op</span><span class="o">.</span><span class="n">broadcast_add</span><span class="p">,</span> |
| <span class="n">operator</span><span class="o">.</span><span class="n">add</span><span class="p">,</span> |
| <span class="n">_internal</span><span class="o">.</span><span class="n">_plus_scalar</span><span class="p">,</span> |
| <span class="kc">None</span><span class="p">)</span> |
| <span class="c1"># pylint: enable= no-member, protected-access</span> |
| |
| |
| <span class="k">def</span> <span class="nf">subtract</span><span class="p">(</span><span class="n">lhs</span><span class="p">,</span> <span class="n">rhs</span><span class="p">):</span> |
| <span class="sd">"""Returns element-wise difference of the input arrays with broadcasting.</span> |
| |
| <span class="sd"> Equivalent to ``lhs - rhs``, ``mx.nd.broadcast_sub(lhs, rhs)`` and</span> |
| <span class="sd"> ``mx.nd.broadcast_minus(lhs, rhs)`` when shapes of lhs and rhs do not</span> |
| <span class="sd"> match. If lhs.shape == rhs.shape, this is equivalent to</span> |
| <span class="sd"> ``mx.nd.elemwise_sub(lhs, rhs)``</span> |
| |
| <span class="sd"> .. note::</span> |
| |
| <span class="sd"> If the corresponding dimensions of two arrays have the same size or one of them has size 1,</span> |
| <span class="sd"> then the arrays are broadcastable to a common shape.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> lhs : scalar or mxnet.ndarray.sparse.array</span> |
| <span class="sd"> First array to be subtracted.</span> |
| <span class="sd"> rhs : scalar or mxnet.ndarray.sparse.array</span> |
| <span class="sd"> Second array to be subtracted.</span> |
| <span class="sd"> If ``lhs.shape != rhs.shape``, they must be</span> |
| <span class="sd"> broadcastable to a common shape.__spec__</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray</span> |
| <span class="sd"> The element-wise difference of the input arrays.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> a = mx.nd.ones((2,3)).tostype('csr')</span> |
| <span class="sd"> >>> b = mx.nd.ones((2,3)).tostype('csr')</span> |
| <span class="sd"> >>> a.asnumpy()</span> |
| <span class="sd"> array([[ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> b.asnumpy()</span> |
| <span class="sd"> array([[ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> (a-b).asnumpy()</span> |
| <span class="sd"> array([[ 0., 0., 0.],</span> |
| <span class="sd"> [ 0., 0., 0.]], dtype=float32)</span> |
| <span class="sd"> >>> c = mx.nd.ones((2,3)).tostype('row_sparse')</span> |
| <span class="sd"> >>> d = mx.nd.ones((2,3)).tostype('row_sparse')</span> |
| <span class="sd"> >>> c.asnumpy()</span> |
| <span class="sd"> array([[ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> d.asnumpy()</span> |
| <span class="sd"> array([[ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> (c-d).asnumpy()</span> |
| <span class="sd"> array([[ 0., 0., 0.],</span> |
| <span class="sd"> [ 0., 0., 0.]], dtype=float32)</span> |
| <span class="sd"> """</span> |
| <span class="c1"># pylint: disable= no-member, protected-access</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">lhs</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">rhs</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">)</span> <span class="ow">and</span> <span class="n">lhs</span><span class="o">.</span><span class="n">shape</span> <span class="o">==</span> <span class="n">rhs</span><span class="o">.</span><span class="n">shape</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">_ufunc_helper</span><span class="p">(</span> |
| <span class="n">lhs</span><span class="p">,</span> |
| <span class="n">rhs</span><span class="p">,</span> |
| <span class="n">op</span><span class="o">.</span><span class="n">elemwise_sub</span><span class="p">,</span> |
| <span class="n">operator</span><span class="o">.</span><span class="n">sub</span><span class="p">,</span> |
| <span class="n">_internal</span><span class="o">.</span><span class="n">_minus_scalar</span><span class="p">,</span> |
| <span class="kc">None</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="n">_ufunc_helper</span><span class="p">(</span> |
| <span class="n">lhs</span><span class="p">,</span> |
| <span class="n">rhs</span><span class="p">,</span> |
| <span class="n">op</span><span class="o">.</span><span class="n">broadcast_sub</span><span class="p">,</span> |
| <span class="n">operator</span><span class="o">.</span><span class="n">sub</span><span class="p">,</span> |
| <span class="n">_internal</span><span class="o">.</span><span class="n">_minus_scalar</span><span class="p">,</span> |
| <span class="kc">None</span><span class="p">)</span> |
| <span class="c1"># pylint: enable= no-member, protected-access</span> |
| |
| |
| <span class="k">def</span> <span class="nf">multiply</span><span class="p">(</span><span class="n">lhs</span><span class="p">,</span> <span class="n">rhs</span><span class="p">):</span> |
| <span class="sd">"""Returns element-wise product of the input arrays with broadcasting.</span> |
| |
| <span class="sd"> Equivalent to ``lhs * rhs`` and ``mx.nd.broadcast_mul(lhs, rhs)``</span> |
| <span class="sd"> when shapes of lhs and rhs do not match. If lhs.shape == rhs.shape,</span> |
| <span class="sd"> this is equivalent to ``mx.nd.elemwise_mul(lhs, rhs)``</span> |
| |
| <span class="sd"> .. note::</span> |
| |
| <span class="sd"> If the corresponding dimensions of two arrays have the same size or one of them has size 1,</span> |
| <span class="sd"> then the arrays are broadcastable to a common shape.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> lhs : scalar or mxnet.ndarray.sparse.array</span> |
| <span class="sd"> First array to be multiplied.</span> |
| <span class="sd"> rhs : scalar or mxnet.ndarray.sparse.array</span> |
| <span class="sd"> Second array to be multiplied.</span> |
| <span class="sd"> If ``lhs.shape != rhs.shape``, they must be</span> |
| <span class="sd"> broadcastable to a common shape.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray</span> |
| <span class="sd"> The element-wise multiplication of the input arrays.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> x = mx.nd.ones((2,3)).tostype('csr')</span> |
| <span class="sd"> >>> y = mx.nd.arange(2).reshape((2,1))</span> |
| <span class="sd"> >>> z = mx.nd.arange(3)</span> |
| <span class="sd"> >>> x.asnumpy()</span> |
| <span class="sd"> array([[ 1., 1., 1.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> y.asnumpy()</span> |
| <span class="sd"> array([[ 0.],</span> |
| <span class="sd"> [ 1.]], dtype=float32)</span> |
| <span class="sd"> >>> z.asnumpy()</span> |
| <span class="sd"> array([ 0., 1., 2.], dtype=float32)</span> |
| <span class="sd"> >>> (x*2).asnumpy()</span> |
| <span class="sd"> array([[ 2., 2., 2.],</span> |
| <span class="sd"> [ 2., 2., 2.]], dtype=float32)</span> |
| <span class="sd"> >>> (x*y).asnumpy()</span> |
| <span class="sd"> array([[ 0., 0., 0.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> mx.nd.sparse.multiply(x, y).asnumpy()</span> |
| <span class="sd"> array([[ 0., 0., 0.],</span> |
| <span class="sd"> [ 1., 1., 1.]], dtype=float32)</span> |
| <span class="sd"> >>> (x*z).asnumpy()</span> |
| <span class="sd"> array([[ 0., 1., 2.],</span> |
| <span class="sd"> [ 0., 1., 2.]], dtype=float32)</span> |
| <span class="sd"> >>> mx.nd.sparse.multiply(x, z).asnumpy()</span> |
| <span class="sd"> array([[ 0., 1., 2.],</span> |
| <span class="sd"> [ 0., 1., 2.]], dtype=float32)</span> |
| <span class="sd"> >>> z = z.reshape((1, 3))</span> |
| <span class="sd"> >>> z.asnumpy()</span> |
| <span class="sd"> array([[ 0., 1., 2.]], dtype=float32)</span> |
| <span class="sd"> >>> (x*z).asnumpy()</span> |
| <span class="sd"> array([[ 0., 1., 2.],</span> |
| <span class="sd"> [ 0., 1., 2.]], dtype=float32)</span> |
| <span class="sd"> >>> mx.nd.sparse.multiply(x, z).asnumpy()</span> |
| <span class="sd"> array([[ 0., 1., 2.],</span> |
| <span class="sd"> [ 0., 1., 2.]], dtype=float32)</span> |
| <span class="sd"> """</span> |
| <span class="c1"># pylint: disable= no-member, protected-access</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">lhs</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">rhs</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">)</span> <span class="ow">and</span> <span class="n">lhs</span><span class="o">.</span><span class="n">shape</span> <span class="o">==</span> <span class="n">rhs</span><span class="o">.</span><span class="n">shape</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">_ufunc_helper</span><span class="p">(</span> |
| <span class="n">lhs</span><span class="p">,</span> |
| <span class="n">rhs</span><span class="p">,</span> |
| <span class="n">op</span><span class="o">.</span><span class="n">elemwise_mul</span><span class="p">,</span> |
| <span class="n">operator</span><span class="o">.</span><span class="n">mul</span><span class="p">,</span> |
| <span class="n">_internal</span><span class="o">.</span><span class="n">_mul_scalar</span><span class="p">,</span> |
| <span class="kc">None</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="n">_ufunc_helper</span><span class="p">(</span> |
| <span class="n">lhs</span><span class="p">,</span> |
| <span class="n">rhs</span><span class="p">,</span> |
| <span class="n">op</span><span class="o">.</span><span class="n">broadcast_mul</span><span class="p">,</span> |
| <span class="n">operator</span><span class="o">.</span><span class="n">mul</span><span class="p">,</span> |
| <span class="n">_internal</span><span class="o">.</span><span class="n">_mul_scalar</span><span class="p">,</span> |
| <span class="kc">None</span><span class="p">)</span> |
| <span class="c1"># pylint: enable= no-member, protected-access</span> |
| |
| |
| <span class="k">def</span> <span class="nf">divide</span><span class="p">(</span><span class="n">lhs</span><span class="p">,</span> <span class="n">rhs</span><span class="p">):</span> |
| <span class="sd">"""Returns element-wise division of the input arrays with broadcasting.</span> |
| |
| <span class="sd"> Equivalent to ``lhs / rhs`` and ``mx.nd.broadcast_div(lhs, rhs)``</span> |
| <span class="sd"> when shapes of lhs and rhs do not match. If lhs.shape == rhs.shape,</span> |
| <span class="sd"> this is equivalent to ``mx.nd.elemwise_div(lhs, rhs)``</span> |
| |
| <span class="sd"> .. note::</span> |
| |
| <span class="sd"> If the corresponding dimensions of two arrays have the same size or one of them has size 1,</span> |
| <span class="sd"> then the arrays are broadcastable to a common shape.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> lhs : scalar or mxnet.ndarray.sparse.array</span> |
| <span class="sd"> First array in division.</span> |
| <span class="sd"> rhs : scalar or mxnet.ndarray.sparse.array</span> |
| <span class="sd"> Second array in division.</span> |
| <span class="sd"> The arrays to be divided. If ``lhs.shape != rhs.shape``, they must be</span> |
| <span class="sd"> broadcastable to a common shape.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> NDArray</span> |
| <span class="sd"> The element-wise division of the input arrays.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> x = (mx.nd.ones((2,3))*6).tostype('csr')</span> |
| <span class="sd"> >>> y = mx.nd.arange(2).reshape((2,1)) + 1</span> |
| <span class="sd"> >>> z = mx.nd.arange(3) + 1</span> |
| <span class="sd"> >>> x.asnumpy()</span> |
| <span class="sd"> array([[ 6., 6., 6.],</span> |
| <span class="sd"> [ 6., 6., 6.]], dtype=float32)</span> |
| <span class="sd"> >>> y.asnumpy()</span> |
| <span class="sd"> array([[ 1.],</span> |
| <span class="sd"> [ 2.]], dtype=float32)</span> |
| <span class="sd"> >>> z.asnumpy()</span> |
| <span class="sd"> array([ 1., 2., 3.], dtype=float32)</span> |
| <span class="sd"> >>> x/2</span> |
| <span class="sd"> <NDArray 2x3 @cpu(0)></span> |
| <span class="sd"> >>> (x/3).asnumpy()</span> |
| <span class="sd"> array([[ 2., 2., 2.],</span> |
| <span class="sd"> [ 2., 2., 2.]], dtype=float32)</span> |
| <span class="sd"> >>> (x/y).asnumpy()</span> |
| <span class="sd"> array([[ 6., 6., 6.],</span> |
| <span class="sd"> [ 3., 3., 3.]], dtype=float32)</span> |
| <span class="sd"> >>> mx.nd.sparse.divide(x,y).asnumpy()</span> |
| <span class="sd"> array([[ 6., 6., 6.],</span> |
| <span class="sd"> [ 3., 3., 3.]], dtype=float32)</span> |
| <span class="sd"> >>> (x/z).asnumpy()</span> |
| <span class="sd"> array([[ 6., 3., 2.],</span> |
| <span class="sd"> [ 6., 3., 2.]], dtype=float32)</span> |
| <span class="sd"> >>> mx.nd.sprase.divide(x,z).asnumpy()</span> |
| <span class="sd"> array([[ 6., 3., 2.],</span> |
| <span class="sd"> [ 6., 3., 2.]], dtype=float32)</span> |
| <span class="sd"> >>> z = z.reshape((1,3))</span> |
| <span class="sd"> >>> z.asnumpy()</span> |
| <span class="sd"> array([[ 1., 2., 3.]], dtype=float32)</span> |
| <span class="sd"> >>> (x/z).asnumpy()</span> |
| <span class="sd"> array([[ 6., 3., 2.],</span> |
| <span class="sd"> [ 6., 3., 2.]], dtype=float32)</span> |
| <span class="sd"> >>> mx.nd.sparse.divide(x,z).asnumpy()</span> |
| <span class="sd"> array([[ 6., 3., 2.],</span> |
| <span class="sd"> [ 6., 3., 2.]], dtype=float32)</span> |
| <span class="sd"> """</span> |
| <span class="c1"># pylint: disable= no-member, protected-access</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">lhs</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">rhs</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">)</span> <span class="ow">and</span> <span class="n">lhs</span><span class="o">.</span><span class="n">shape</span> <span class="o">==</span> <span class="n">rhs</span><span class="o">.</span><span class="n">shape</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">_ufunc_helper</span><span class="p">(</span> |
| <span class="n">lhs</span><span class="p">,</span> |
| <span class="n">rhs</span><span class="p">,</span> |
| <span class="n">op</span><span class="o">.</span><span class="n">elemwise_div</span><span class="p">,</span> |
| <span class="n">operator</span><span class="o">.</span><span class="n">truediv</span><span class="p">,</span> |
| <span class="n">_internal</span><span class="o">.</span><span class="n">_div_scalar</span><span class="p">,</span> |
| <span class="kc">None</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="n">_ufunc_helper</span><span class="p">(</span> |
| <span class="n">lhs</span><span class="p">,</span> |
| <span class="n">rhs</span><span class="p">,</span> |
| <span class="n">op</span><span class="o">.</span><span class="n">broadcast_div</span><span class="p">,</span> |
| <span class="n">operator</span><span class="o">.</span><span class="n">truediv</span><span class="p">,</span> |
| <span class="n">_internal</span><span class="o">.</span><span class="n">_div_scalar</span><span class="p">,</span> |
| <span class="kc">None</span><span class="p">)</span> |
| <span class="c1"># pylint: enable= no-member, protected-access</span> |
| |
| |
| <span class="k">def</span> <span class="nf">zeros</span><span class="p">(</span><span class="n">stype</span><span class="p">,</span> <span class="n">shape</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="sd">"""Return a new array of given shape and type, filled with zeros.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> stype: string</span> |
| <span class="sd"> The storage type of the empty array, such as 'row_sparse', 'csr', etc</span> |
| <span class="sd"> shape : int or tuple of int</span> |
| <span class="sd"> The shape of the empty array</span> |
| <span class="sd"> ctx : Context, optional</span> |
| <span class="sd"> An optional device context (default is the current default context)</span> |
| <span class="sd"> dtype : str or numpy.dtype, optional</span> |
| <span class="sd"> An optional value type (default is `float32`)</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> RowSparseNDArray or CSRNDArray</span> |
| <span class="sd"> A created array</span> |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> mx.nd.sparse.zeros('csr', (1,2))</span> |
| <span class="sd"> <CSRNDArray 1x2 @cpu(0)></span> |
| <span class="sd"> >>> mx.nd.sparse.zeros('row_sparse', (1,2), ctx=mx.cpu(), dtype='float16').asnumpy()</span> |
| <span class="sd"> array([[ 0., 0.]], dtype=float16)</span> |
| <span class="sd"> """</span> |
| <span class="c1"># pylint: disable= no-member, protected-access</span> |
| <span class="k">if</span> <span class="n">stype</span> <span class="o">==</span> <span class="s1">'default'</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">_zeros_ndarray</span><span class="p">(</span><span class="n">shape</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">ctx</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">ctx</span> <span class="o">=</span> <span class="n">current_context</span><span class="p">()</span> |
| <span class="n">dtype</span> <span class="o">=</span> <span class="n">mx_real_t</span> <span class="k">if</span> <span class="n">dtype</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">dtype</span> |
| <span class="k">if</span> <span class="n">stype</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'row_sparse'</span><span class="p">,</span> <span class="s1">'csr'</span><span class="p">):</span> |
| <span class="n">aux_types</span> <span class="o">=</span> <span class="n">_STORAGE_AUX_TYPES</span><span class="p">[</span><span class="n">stype</span><span class="p">]</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"unknown storage type"</span> <span class="o">+</span> <span class="n">stype</span><span class="p">)</span> |
| <span class="n">out</span> <span class="o">=</span> <span class="n">_ndarray_cls</span><span class="p">(</span><span class="n">_new_alloc_handle</span><span class="p">(</span><span class="n">stype</span><span class="p">,</span> <span class="n">shape</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="kc">True</span><span class="p">,</span> <span class="n">dtype</span><span class="p">,</span> <span class="n">aux_types</span><span class="p">))</span> |
| <span class="k">return</span> <span class="n">_internal</span><span class="o">.</span><span class="n">_zeros</span><span class="p">(</span><span class="n">shape</span><span class="o">=</span><span class="n">shape</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">,</span> <span class="n">out</span><span class="o">=</span><span class="n">out</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| <span class="c1"># pylint: enable= no-member, protected-access</span> |
| |
| |
| <span class="k">def</span> <span class="nf">empty</span><span class="p">(</span><span class="n">stype</span><span class="p">,</span> <span class="n">shape</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""Returns a new array of given shape and type, without initializing entries.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> stype: string</span> |
| <span class="sd"> The storage type of the empty array, such as 'row_sparse', 'csr', etc</span> |
| <span class="sd"> shape : int or tuple of int</span> |
| <span class="sd"> The shape of the empty array.</span> |
| <span class="sd"> ctx : Context, optional</span> |
| <span class="sd"> An optional device context (default is the current default context).</span> |
| <span class="sd"> dtype : str or numpy.dtype, optional</span> |
| <span class="sd"> An optional value type (default is `float32`).</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> CSRNDArray or RowSparseNDArray</span> |
| <span class="sd"> A created array.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">shape</span><span class="p">,</span> <span class="nb">int</span><span class="p">):</span> |
| <span class="n">shape</span> <span class="o">=</span> <span class="p">(</span><span class="n">shape</span><span class="p">,</span> <span class="p">)</span> |
| <span class="k">if</span> <span class="n">ctx</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">ctx</span> <span class="o">=</span> <span class="n">current_context</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">dtype</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">dtype</span> <span class="o">=</span> <span class="n">mx_real_t</span> |
| <span class="k">assert</span><span class="p">(</span><span class="n">stype</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">stype</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'csr'</span><span class="p">,</span> <span class="s1">'row_sparse'</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">zeros</span><span class="p">(</span><span class="n">stype</span><span class="p">,</span> <span class="n">shape</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s2">"unknown stype : "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">stype</span><span class="p">))</span> |
| |
| |
| <span class="k">def</span> <span class="nf">array</span><span class="p">(</span><span class="n">source_array</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""Creates a sparse array from any object exposing the array interface.</span> |
| |
| <span class="sd"> Parameters</span> |
| <span class="sd"> ----------</span> |
| <span class="sd"> source_array : RowSparseNDArray, CSRNDArray or scipy.sparse.csr.csr_matrix</span> |
| <span class="sd"> The source sparse array</span> |
| <span class="sd"> ctx : Context, optional</span> |
| <span class="sd"> The default context is ``source_array.context`` if ``source_array`` is an NDArray. \</span> |
| <span class="sd"> The current default context otherwise.</span> |
| <span class="sd"> dtype : str or numpy.dtype, optional</span> |
| <span class="sd"> The data type of the output array. The default dtype is ``source_array.dtype``</span> |
| <span class="sd"> if `source_array` is an `NDArray`, `numpy.ndarray` or `scipy.sparse.csr.csr_matrix`, \</span> |
| <span class="sd"> `float32` otherwise.</span> |
| |
| <span class="sd"> Returns</span> |
| <span class="sd"> -------</span> |
| <span class="sd"> RowSparseNDArray or CSRNDArray</span> |
| <span class="sd"> An array with the same contents as the `source_array`.</span> |
| |
| <span class="sd"> Examples</span> |
| <span class="sd"> --------</span> |
| <span class="sd"> >>> import scipy.sparse as spsp</span> |
| <span class="sd"> >>> csr = spsp.csr_matrix((2, 100))</span> |
| <span class="sd"> >>> mx.nd.sparse.array(csr)</span> |
| <span class="sd"> <CSRNDArray 2x100 @cpu(0)></span> |
| <span class="sd"> >>> mx.nd.sparse.array(mx.nd.sparse.zeros('csr', (3, 2)))</span> |
| <span class="sd"> <CSRNDArray 3x2 @cpu(0)></span> |
| <span class="sd"> >>> mx.nd.sparse.array(mx.nd.sparse.zeros('row_sparse', (3, 2)))</span> |
| <span class="sd"> <RowSparseNDArray 3x2 @cpu(0)></span> |
| <span class="sd"> """</span> |
| <span class="n">ctx</span> <span class="o">=</span> <span class="n">current_context</span><span class="p">()</span> <span class="k">if</span> <span class="n">ctx</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">ctx</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source_array</span><span class="p">,</span> <span class="n">NDArray</span><span class="p">):</span> |
| <span class="k">assert</span><span class="p">(</span><span class="n">source_array</span><span class="o">.</span><span class="n">stype</span> <span class="o">!=</span> <span class="s1">'default'</span><span class="p">),</span> \ |
| <span class="s2">"Please use `tostype` to create RowSparseNDArray or CSRNDArray from an NDArray"</span> |
| <span class="c1"># prepare dtype and ctx based on source_array, if not provided</span> |
| <span class="n">dtype</span> <span class="o">=</span> <span class="n">_prepare_default_dtype</span><span class="p">(</span><span class="n">source_array</span><span class="p">,</span> <span class="n">dtype</span><span class="p">)</span> |
| <span class="c1"># if both dtype and ctx are different from source_array, we cannot copy directly</span> |
| <span class="k">if</span> <span class="n">source_array</span><span class="o">.</span><span class="n">dtype</span> <span class="o">!=</span> <span class="n">dtype</span> <span class="ow">and</span> <span class="n">source_array</span><span class="o">.</span><span class="n">context</span> <span class="o">!=</span> <span class="n">ctx</span><span class="p">:</span> |
| <span class="n">arr</span> <span class="o">=</span> <span class="n">empty</span><span class="p">(</span><span class="n">source_array</span><span class="o">.</span><span class="n">stype</span><span class="p">,</span> <span class="n">source_array</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">)</span> |
| <span class="n">arr</span><span class="p">[:]</span> <span class="o">=</span> <span class="n">source_array</span> |
| <span class="n">arr</span> <span class="o">=</span> <span class="n">arr</span><span class="o">.</span><span class="n">as_in_context</span><span class="p">(</span><span class="n">ctx</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">arr</span> <span class="o">=</span> <span class="n">empty</span><span class="p">(</span><span class="n">source_array</span><span class="o">.</span><span class="n">stype</span><span class="p">,</span> <span class="n">source_array</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">)</span> |
| <span class="n">arr</span><span class="p">[:]</span> <span class="o">=</span> <span class="n">source_array</span> |
| <span class="k">return</span> <span class="n">arr</span> |
| <span class="k">elif</span> <span class="n">spsp</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source_array</span><span class="p">,</span> <span class="n">spsp</span><span class="o">.</span><span class="n">csr</span><span class="o">.</span><span class="n">csr_matrix</span><span class="p">):</span> |
| <span class="c1"># TODO(haibin) implement `_sync_copy_from` with scipy csr object to reduce a copy</span> |
| <span class="c1"># preprocess scipy csr to canonical form</span> |
| <span class="n">csr</span> <span class="o">=</span> <span class="n">source_array</span><span class="o">.</span><span class="n">sorted_indices</span><span class="p">()</span> |
| <span class="n">csr</span><span class="o">.</span><span class="n">sum_duplicates</span><span class="p">()</span> |
| <span class="n">dtype</span> <span class="o">=</span> <span class="n">_prepare_default_dtype</span><span class="p">(</span><span class="n">source_array</span><span class="p">,</span> <span class="n">dtype</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">csr_matrix</span><span class="p">((</span><span class="n">csr</span><span class="o">.</span><span class="n">data</span><span class="p">,</span> <span class="n">csr</span><span class="o">.</span><span class="n">indices</span><span class="p">,</span> <span class="n">csr</span><span class="o">.</span><span class="n">indptr</span><span class="p">),</span> <span class="n">shape</span><span class="o">=</span><span class="n">csr</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> \ |
| <span class="n">dtype</span><span class="o">=</span><span class="n">dtype</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="n">ctx</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source_array</span><span class="p">,</span> <span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">ndarray</span><span class="p">,</span> <span class="n">np</span><span class="o">.</span><span class="n">generic</span><span class="p">)):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Please use mx.nd.array to create an NDArray with source_array of type "</span><span class="p">,</span> |
| <span class="nb">type</span><span class="p">(</span><span class="n">source_array</span><span class="p">))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Unexpected source_array type: "</span><span class="p">,</span> <span class="nb">type</span><span class="p">(</span><span class="n">source_array</span><span class="p">))</span> |
| </pre></div> |
| |
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